Why does the father determine the gender

For tips in more detail, refer to Signs You Are Pregnant With A Girl! Aug 30, 2019 Things parents can do to improve their child's mood and behaviour science explained that male sperms determine the baby's sex,  Sep 23, 2020 A new research paper published by Newcastle University in England has revealed that father's genes decide whether you will have sons or  Feb 12, 2020 The fastest “sperm” determines gender. A new study is currently looking at families and helping them determine whether they are more likely to have a boy or a girl. Whether you're a single father heading to the court for the first time, or you're appealing an existing child The father has brown hair, the mother has black hair, the son has ginger hair and the daughter is blonde. Marshall, the court paid lip service to a sex-neutral standard, as noted above. The 23rd pair of chromosomes establishes the sex of the baby. This test is 92 to 99% accurate in detecting conditions and the baby’s gender. And the more we laughed, the harder it was to do. For many years, morning sickness has been used to predict the outcome of a pregnancy. To determine the inheritance of red-green colorblindness (or any other X-linked trait), the genotypes of the parents must be considered. 9% accuracy if a man isn’t a person’s biological father. These are simplistic ways of thinking about what is scientifically very complex. The result means that there are millions of families where the older brother gets the George Clooney hair while the younger is stuck with the Vin Diesel look, or visa versa. All mammals are likely to use the majority of genetic material passed down from males, even According to Dr. 2. “It was daunting. The scenario many of us learned in school is that two X chromosomes make someone female, and an X and a Y chromosome make someone male. Does that mean that babies look more like their fathers than their  Jun 18, 2021 Gender selection might appeal to parents who have a child or In a regular IVF cycle, scientists try to determine which embryos have the  Jul 31, 2015 Meanwhile, sex is determined at conception by the genes each of us inherits from mom and dad. Gender is determined immediately upon fertilization. Jul 20, 2018 The prevailing dogma in modern science that the father is the determining factor for the sex of the offspring is based on the observation of sex  One could say, then, that the father-or, at least, his sperm-determines the sex of the child. The mother's egg contains an X chromosome, while the father's sperm carries either another X or a Y chromosome. For example, your child may not  Jul 22, 2015 How much does this change depending on whether it's the first data on how many parents decide to find out if it's a girl or a boy. The point is that men have many positive traits as spiritual beings, but the spiritual connection to a person’s roots goes through the person who is closest to that connection, the mother. This is because, during sexual reproduction, each parent will One could say, then, that the father-or, at least, his sperm-determines the sex of the child. “Oh yes, the father, well, he died in the war . receives information based on the DNA they inherited from both parents. For some parents, the desire to be surprised at the birth is stronger than the curiosity to find out during the pregnancy. One common question that I often get is "does the male or father determine the sex of the baby?" The answer to this question is both yes and no. The biological sex of babies may not determine their gender later. The test allows the pregnant women to determine the baby’s condition and gender without taking an invasive procedure like CVS or amniocentesis. Why does the father determine the gender of the child? (As Figure 27-11 indicates, a female has an XX pair of sex chromosomes, whereas a male has an XY pair of sex chromosomes. In fact, the Y chromosome has a gene called “sex determining region Y. He does not deny the existence or impact of premarital or extramarital sex, but states that the family offers a socially legitimate sexual outlet for adults (Lee 1985). This is why offspring has a mixture of traits from both the mother and the father. Click here to get an answer to your question ✍️ \"The sex of the children is determined by what they inherit from their father and not their mother\". Why? Just make vague references when asked. A father’s connection with his child and how similar the two look can help determine relation to some extent. An X and a Y is a boy, and 2 X's is a girl. Kind of like how if your father is tall, you will more than likely be tall as well. Kyle D. Sep 18, 2018 There are many ways parents can promote healthy gender Such interests also do not determine or influence one's gender identity. How to Read Your Paternity Test Results. They probably won't go bald because they have an extra X chromosome from mom. All mammals are likely to use the majority of genetic material passed down from males, even Kyle D. Gender Assigned. Option 3: Honesty. The husband does, however, have the opportunity to rebut or challenge that presumption of paternity. The grandsons have the mf combination of alleles, because they inherited an m from their father and f from their There is controversy about the influence of the father's age. DNA Diagnostics Center (DDC) is the world leader in DNA Paternity Testing, performing over one million paternity tests each year. The instrumental role a father plays in the life of his daughter leaves a mark that can't be changed. The father will determine the sex of the child. Ultrasound scans are not a 100% accurate way to determine the sex of a baby. Your partner's sperm may having nothing to do with it, but your father's DNA does, according to Science Mag. Avoiding Disappointment. process used to determine the biological father of a child. Sometimes a DSD may be diagnosed if an older child does not go through puberty properly. Studies show that personal gender identity is typically settled upon between 2-3 years of age, a year or two after the child recognizes a difference between genders, and does not usually change. By observing their fathers’ behavior, they learned more about the need For many, this does stem from your biological sex, to some degree, but the science is set that “gender identity” is both real and exists on a spectrum. Each parent transmits only one sex chromosome. There are ways to predict your baby's future height if you want. Scientists from Newcastle University found that men inherit from their parents a tendency to have more sons or more daughters. Pruett, Fatherneed: Why Father Care is as Essential as Mother Care for Your Child, (New York: The Free Press, 2000), p. An X chromosome combines with the  Most children will continue to have a gender identify that matches the Children do best when their parents or caregivers show them that they are loved  Parents who are related to each other are more likely have children with health As well as determining sex, the sex chromosomes carry genes that control  Are you male or female? Do you know how you got to be that way? Your gender is a trait that you inherit, randomly, from your parents' DNA. Genes from your father are more dominant than those inherited from your mother, new research has shown. For example, if a mother is a carrier for colorblindness (X + X c), and a father has normal vision X + Y, then their sons have a 50% chance of colorblindness because they inherit their X chromosome from their A father’s connection with his child and how similar the two look can help determine relation to some extent. If you are male, you have an XY pair. A solitary type of man. The father has one X chromosome and one Y chromosome, can give either his X or Y The human genome is organized into 23 pairs of chromosomes (22 pairs of autosomes and one pair of sex chromosomes), with each parent contributing one chromosome per pair. The average male ejaculation contains a whooping number of 200 million – 500 million sperm. Fathers are extremely important, especially to their daughters. ” Pruett, 2000, p. However, if the biological parents are not married to each other at the time of conception or Sex biology redefined: Article suggests that genes don’t indicate binary sexes. A mother’s egg carries only an X chromosome, while a father’s sperm either carries either an X chromosome, or a Y chromosome. So, in an indirect way, the maternal parent also has some influence on the sex of the child. The color of our hair is a complex liaison of genetic factors, with several genes from both parents involved in determining the exact shade. Sep 2, 2014 “While the gender pay gap has been decreasing, the pay gap related to We argue that the earnings of unmarried fathers who do not  Feb 15, 2021 “While many students will identify as 'mothers' or 'fathers', using these terms alone to describe parenthood excludes those who do not  Gender ''The father determines the sex of the baby'' - Miracles of Quran #HUDATV #HUDATV Huda TV A Light in Every home SUBSCRIBE  Feb 16, 2021 “While many students will identify as 'mothers' or 'fathers', using these terms alone to describe parenthood excludes those who do not  Nov 17, 2017 As we get more comfortable with the notion that gender is not binary, dad” is a lesbian or genderqueer parent who does not identify with . Since males carry both an X and a Y chromosome, the offspring will be either a female or a male, respectively, depending The sex chromosomes determine the sex of offspring. These not only carry the genes that determine male and  Advice for parents of older children. They can pass the disease on to their children, but do not have the disease themselves. If you search the web for "gender selection" you'll get multiple hits to articles That male determines the sex of the children, so the grandchildren are all male. Sex chromosomes determine whether you are male or female. Men, according to Jewish law, have more obligations than women do. When I tell patients there's about a 50/50 chance for either sex, I also tell them the father's genes determine the baby's sex since some of his sperm carries X chromosomes and some carries Y chromosomes. the father does. The Gospels again: “When a woman is carrying a child and she wishes to know whether she is carrying a boy or a girl, you should sprinkle salt on her head while she is sleeping Sex chromosomes determine whether you are male or female. ” In order to properly explain the way race is determined on a US birth certificate, we must first go over a few details: A citizen’s birth details are recorded on their Certificate of Live Birth when their birth is registered by the hospital. However, if you're a father trying to win child custody, you may wonder if your gender could impact your case, especially given the past practice of mothers seemingly having a measurable advantage in family courts across the nation. But it’s not so much a guarantee as it is an educated guess. fluid (moves between gender identities) or agender (doesn't identify with any gender). 3. Mix a bit of baking soda in your urine, if there is no reaction and the mixture does not turn fuzzy, then it is a girl. Father’s Genes Determine if it’s a Boy or a Girl. Most researchers consider that the father's age does not appear to affect the chance of having a child with Down's syndrome. One of those pairs are the chromosomes that determine the biological  Aug 8, 2016 Strong or dominant genes determine your baby's hair color, too. The 21th genetic marker tested is known as the amelogenin gene and simply determines the sex of the child. Sex-linked diseases are passed down through families through one of the X or Y chromosomes. There are plenty of stories of surprised parents in the birth room, who have gone crazy buying lots of frilly dresses, painted a pink nursery, and picked out But while underwear may not determine the gender of sperm, there is some evidence suggesting it can influence sperm production and affect the likelihood of having a baby of either sex, Meachem says. Pruett, “positive father care is associated with more pro-social and positive moral behavior in boys and girls. Dec 31, 2013 The Sex-determining Region Y (Sry in mammals but SRY in humans) is a from the mother, and either an X or Y chromosome from the father. You pass the baking soda gender test. “If a father has a bigger penis, the son’s will probably be similar in length,” he says. Each test is processed at our state-of-the art facility outside Cincinnati, providing online results as soon as 24 to 48 hours after the samples arrive at our lab and go into test This is why it is perfectly possible to have an older brother with enviable full, thick hair, while you are stuck with a Norwood 3 at age 27. A father does not transmit X-linked alleles to a son, so the disease cannot be X-linked dominant. We inherit a set of 23 chromosomes from our mothers and another set of 23 from our fathers. In addition statistics show that the probability of the child having a specific sex is correlated with the sex of the previous children. Dec 8, 2017 Whether a person has XX or XY chromosomes is determined when a sperm The father's sperm contains about half X and half Y chromosomes. The salt test. The questionnaire is filled, in part, by the new parents, who state the mother’s race and the father It’s always a hot topic for mother-to-be and father-to-be. Sex biology redefined: Article suggests that genes don’t indicate binary sexes. Here are 10 reasons father-daughter relationships are so crucial in a young woman's development. According to mainstream medicine, defining baby’s gender is simple: at the moment of ejaculation the male releases a collective of individual sperm (some male, some female). Each parent must give one allele. A test can show with 99. 52. by Rane. that can help guide decisions about your baby's gender and any necessary treatment. At the present time about one baby with Down's syndrome is born for every 1,000 total births. If the family for instance already have 2 boys, the probability of the third child being a boy is a little more than 52%. But in practice, it favored the father. It took us, like, 20 minutes. An X chromosome combines with the mother's X chromosome to make a baby girl (XX) and a Y The sex of a baby is determined by two sex chromosomes inherited from both the genetic parents. An X chromosome combines with the mother’s X chromosome to make a baby girl (XX) and a Y The mother always gives the X sex chromosome, because that is all she has to give. If a father has the condition: He cannot (0% chance) pass on the gene that does not work correctly to his sons, because it is on his X chromosome. These X chromosomes do form a bona fide homologous pair. Hebrew is a gender based language, so words are either masculine or feminine. Author. This is because, during sexual reproduction, each parent will The gamete contributed by the father determines the sex of the offspring. Adjust my perfect ’50s-style chignon as I walked away, hips swinging, heels clinking. Morning Sickness and Baby's Gender. Most of the participants indicated that (1) fathers can give daughters hope for romantic relationships, especially when fathers are committed in their own romantic relationships, and that (2) fathers can influence daughters’ perceptions of relationships. On the other hand, it was determined that the gender the children whose fathers do not take responsibility in housework (78; 77). Bornstein, a trans woman who finds gender deeply problematic, sums up this resistance nicely in her 1995 book title, Gender Outlaw: On Men, Women and the Rest of Us1. The chromosomes that determine the sex of the baby (X and Y chromosomes) are called sex chromosomes. . The grandsons have the mf combination of alleles, because they inherited an m from their father and f from their mother. you see a woman genes are both y and men's genes have an x and a y if the father gives a y it is going to be a girl if he gives it and x it will be a boy. Obviously, if you get your period between the date on which you have sex with a man and the date you conceive, then he can’t be your baby’s father. Continued Low-Tech Methods of Sex Selection. Human X and Y chromosomes determine the biological sex of a person, with XX specifying female  Each son gets an X from his mother and a Y from his father. However, what the mother contributes does not change and cannot fluctuate no matter what you do. The science of twins is something that was fairly unknown for a long time. This is also known as SRY. “The sperm determines the sex of a baby depending on whether they are carrying an X or Y chromosome. Joel Gator Warsh, a Southern California-based integrative pediatrician, we do not know why some women tend to have only boys or girls. Each sperm consists of either an X or a Y chromosome, so the father's contribution determines the sex of the offspring. Most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. The gamete contributed by the father determines the sex of the offspring. But the correct answer to the question is not as simple as it might seem. If one of the parents is homozygous recessive, ff, then the offspring must have a heterozygous, Ff, genotype. that is what determines Genes from your father are more dominant than those inherited from your mother, new research has shown. e. In approximately 27 states, the District of Columbia, American Samoa, and the Northern Mariana Islands, a man may be presumed to be the father of a child in any of The researchers found that girls raised in father-absent homes or dysfunctional father-present homes experienced relatively early pubertal timing. This is why dad determines the gender of the child. Typically, the mother’s egg contributes an X chromosome, and the father’s sperm provides either an X or a Y chromosome. However these are not guaranteed methods of identifying a baby’s paternity, as some fathers have difficulty bonding in the first year and some babies look more like their mother’s side of the family. An X and Y combine to make a boy, while an XX make a girl. Women, on the other hand, have a sex chromosome pairing of XX, inheriting one X chromosome from each parent. 5 inches (5'7. Gender  Jun 17, 2021 Through this test, doctors can also determine the gender of your baby. The abnormal gene dominates. However, this decision does require careful consideration as it requires a Intended parents can determine gender through PGD/PGS/PGT-A during IVF! Jul 7, 2017 The mystery was so simple but daunting: Why do boys become boys and sex was determined by the body temperature of the father during sex. The affected father can transmit either an autosomal dominant allele, or an X-linked dominant The odds of passing down a condition that is X-linked dominant are different depending on whether the mother or father has the gene that does not function properly and on the sex of the child. Nov 28, 2019 This is why studying XCI is important! The patterns of disease gene expression that result from XCI might determine how severely someone is  Dec 13, 2018 And when it turns out that the baby is a particular gender, it's more likely that if he does have the condition, it came from mom's side  Feb 13, 2020 The battle late last year in Texas between two parents over the gender identity of their child sparked a raft of bills across the United  But how do you pick a child's gender if she or he is intersex? have been done and the parents have consulted with the doctors on which gender the child  Feb 27, 2014 Technically, the father determines the sex of the offspring. The sim will show a speech bubble and a picture of a baby and a female or male sign. In the words of Dr. Many of your relatives probably have an answer to the question of whether you are more your mother or your father’s child. • Gender identity is an individual’s deeply held sense of being male, female or another gender. Got it. But while underwear may not determine the gender of sperm, there is some evidence suggesting it can influence sperm production and affect the likelihood of having a baby of either sex, Meachem says. During the ultrasound scan, the technician will warn you that they can not say with 100% certainty either way. that is what determines The odds of passing down a condition that is X-linked dominant are different depending on whether the mother or father has the gene that does not function properly and on the sex of the child. In friendly interactions, choose Determine Gender of Baby. ” had no specialized sex chromosomes that determine the sex of the offspring. “The father, oh yes, he was a good man. During the ten-month pregnancy period, the most interesting thing is no more than guessing the baby’s gender. Mr. However, you should not go for these tests for the sake of gender  Dec 10, 2019 In other cases, parents may be unaware of birth registration or may not This kind of gender discrimination in national laws and policies  Mar 15, 2021 Or your child might use another term to identify their gender. So why is the idea of natural gender selection gaining  Dec 12, 2008 Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. This is because, during sexual reproduction, each parent will donate one gamete. The first surprise of Michèle’s DNA test was how much saliva it took. Why do people need DNA paternity tests? Hebrew is a gender based language, so words are either masculine or feminine. A child’s sex is always determined by the father, since men cast the deciding chromosome either an X or a Y while women produce eggs that carry an X chromosome. Men and women also have different chromosomes in the reproductive cells, which can be used to determine the sex of the offspring. Because the mother can only contribute an X chromosome, the father determines the The sex chromosomes, X and Y, determine the gender of one's offspring. A woman has two X chromosomes and thus gives either of her X chromosomes. On the other hand, the first sperm to reach the egg isn't  Does this test have other names? Genetic testing, karyotyping They determine if you will be male or female. Sex-linked recessive. The father can contribute an X or a Y chromosome, while the mother always contributes an X. More: 8 Traits Babies Inherit From Their Father. It may become visible by ultrasound several  A person's characteristics are determined by the interaction of the copies Most researchers consider that the father's age does not appear to affect the  A particularly important category of genetic linkage has to do with the X and Y sex chromosomes. Whether you're a single father heading to the court for the first time, or you're appealing an existing child How does XY relate to gender? Females typically have the XX sex chromosome and males have XY. The DNA can be detected as early as seven weeks, and the quantity of this DNA increases when the pregnancy progresses. This outlet gives way to reproduction, which is a necessary part of ensuring the survival of society. It's all about Dad's genes. Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. Methods to up the odds of conceiving a boy or a girl are plentiful. And while they may have similar physical makeup, their bodies are distinct and genetically unique. That's why genes  May 30, 2007 When did you first discover your interest in intersex individuals and [SRY, or sex-determining region Y, encodes the so-called testis  parents and teachers questions about gender, take on “boy” and “girl” roles in dramatic that force a child to self-identify as one gender or another. The sex chromosome pairing for a man is XY, meaning all you fellas out there inherited one X from your mother and one Y from your father. Why? To determine the second allele, you must examine the genotypes of the parents or offspring. He will give his "balding" X to his daughters. An individual’s sex (i. Gellatly found evidence that Father Presence. , whether they are a male or female) is determined by the sex chromosomes. Each test is processed at our state-of-the art facility outside Cincinnati, providing online results as soon as 24 to 48 hours after the samples arrive at our lab and go into test the father does. But some children do experience gender dysphoria, especially if they  May 14, 2021 In a TikTok video, a father-to-be proved himself the biggest baby at his future child's gender reveal when the balloons came out pink  Apr 18, 2018 Mayo Clinic does not endorse companies or products. which women do not inherit, the assignment is only available for males. Gellatly found evidence that These findings don’t change the fact that the contribution of either an X or Y chromosome by the father’s sperm genetically determines the sex of the child. According to old wives tales, the sicker the mother, the more likely she is to give birth to a baby girl, though this is not a rule. Although there are some scientific ways to predict the baby’s sex such as Ultrasonic scanning, more people like to use some popular and traditional ways to predict. The Y chromosome is one-third the size of the X chromosome and contains about 55 genes while the X chromosome has about 900 genes. They present several theories as to why this occurs. On the other hand, the first sperm to reach the egg isn't necessarily the one that fertilizes it; human eggs are rather choosy about that sort of thing. How accurate is a DNA paternity test? DNA paternity tests are extremely accurate. A DNA paternity test uses DNA, usually taken from a cheek swab, to determine whether a man is the child’s biological father. Let’s return to the ultrasound discussion. In the 1930s, Alfred Jost determined that the presence of testosterone was required for  May 27, 2020 Medical science proves beyond doubt that a baby's gender is determined by the father. In other words, our mothers always give us an X chromosome to which our dad will add either an X or a Y. It’s not just humans that have chromosomes, as many animals and plants have their own pairs of chromosomes as well. Imagine that someone has a maternal grandfather who is balding. If the findings of the British study hold true, the influence of diet would be to create conditions in the mother’s body that favor sperm carrying a particular chromosome and That male determines the sex of the children, so the grandchildren are all male. Dominant inheritance occurs when an abnormal gene from one parent causes disease, even though the matching gene from the other parent is normal. The father has brown hair, the mother has black hair, the son has ginger hair and the daughter is blonde. One way to make a rough estimate for a girl is to subtract five inches from the father's height and average it with the mother's height. To get a more precise figure we should really take these facts into account. Why do people need DNA paternity tests? What happens if the mother and father complete a Paternity Affidavit and the father dies? When the Paternity Affidavit is registered and certified by the DVS, the rights and duties of the child regarding the father will be recognized, and the child may be eligible for Social Security benefits, insurance benefits, inheritance or estate distribution. By observing their fathers’ behavior, they learned more about the need How to Read Your Paternity Test Results. A person with an XX pairing of sex chromosomes is biologically female, while a person with an XY pairing is biologically Why are only 20 Markers Compared when there a Total of 21 Markers Tested? If any less than 20 markers match between an alleged father and child in a DNA paternity than the individual is excluded as the child’s biological father. Aug 30, 2016 “And I think we have to do something about that. So why is the idea of natural gender selection gaining ground? Rosalind Scutt investigates. According to Dr. It should be kept in mind that mammal sex determination is complex. I'll explain why in this article. An XX combination means your baby is female and an XY combination means your baby is male. It recognized a "father's interest in having the child bear his surname," but it did not recognize a mother's similar interest as having equal weight. In truth, both the mother and the father are going to contribute half of the genetic blueprint for the baby that they are conceiving. There are plenty of stories of surprised parents in the birth room, who have gone crazy buying lots of frilly dresses, painted a pink nursery, and picked out That said, according to Paduch, most men in a family do tend to share a similar dick length and shape. Father Presence. I have a couple of blogs that cover natural gender selection. 41-42. Purse my lips, shrug. It is commonly argued that biological differences between males and females determine gender by causing enduring differences in capabilities and dispositions. X and Y are sex chromosomes. The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the One could say, then, that the father-or, at least, his sperm-determines the sex of the child. The father does not know with his son's intellect; the son does not choose with his father's will. This is separate from biological sex. . This is also how older ladies predict the baby’s gender just by looking at your tummy. For example, dad could do the laundry and mum could mow the lawn. If both parents are homozygous dominant, FF, then the offspring must also be homozygous dominant, FF. You cannot help but wonder if the family members are not biologically connected. However, if the biological parents are not married to each other at the time of conception or the father of a child. It is believed that the gender of your baby is linked to the severity of morning sickness. Since males carry both an X and a Y chromosome, the offspring will be either a female or a male, respectively, depending The father will determine the sex of the child. ”. Keep all those facts in mind when you use the conception calculator to determine who might be the father of your baby. 5"). The SRY can create testes in the embryo Does the Mother or Father Determine the Baby’s Gender? A father’s sperm determines a baby’s gender. When a woman is married, her husband is legally presumed to be the father of the child. As a result, they have an equal number of sons and daughters (the great-grandchildren). There is controversy about the influence of the father's age. • When an affected daughter of non-founding parents has an affected father, we cannot determine whether the DOMINANT disease is autosomal or x-linked. A “presumed father” is a man who is recognized as the father of a child until that status is rebutted or confirmed in a judicial proceeding. Sometimes doctors do surgeries on intersex babies and children to make their decide on a sex, either male or female, and raise the baby as the gender  Mar 29, 2016 A father's sperm and a mother's egg each has only half – 23 each. If an embryo has "XX",  Apr 25, 2017 Your gender is ultimately determined by your father, who has both an X and a Y chromosome and could contribute either of them. This means that the father is who determines the sex of a child. There are two sex chromosomes: the "X" and the "Y". The father, however, can give either an X or a Y. A child that is born neither male or female is a rare occurrence but babies born with some form of Disorder of Sex Development (DSD) happens in one in every 1,500 births, according to the support Just make vague references when asked. But how come when I meet a family with only  Aug 2, 2016 Each sperm carries either an X chromosome or no sex chromosome at all – but once again, as in XY, the father's contribution determines the  How did researchers discover these so-called sex chromosomes? inherit their X chromosome from their mother and their Y chromosome from their father. So, for a father who is 72 inches tall (6'2") and a mother who is 66 inches tall (5'6"), the result is 67. What this means is that a daughter always gets dad's X chromosome and a son always gets dad's Y chromosome. A baby will normally inherit one sex chromosome from the mother and one from the father. Then in the top right corner, it will say whether your sim is having a girl or a boy.