What Determines Baby's Sex: Understanding Chromosome Inheritance

Discover how a baby's sex is determined by chromosomes inherited from parents. Learn about X and Y chromosomes in this insightful Q&A.

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A baby's sex is determined by the chromosomes inherited from the parents. Humans have two sex chromosomes, X and Y. An egg from the mother always contributes an X chromosome, while a sperm from the father can contribute either an X or a Y chromosome. If an X chromosome from the sperm fertilizes the egg, the baby is female (XX). If a Y chromosome fertilizes the egg, the baby is male (XY).

FAQs & Answers

  1. What chromosomes determine a baby's sex? A baby's sex is determined by the combination of sex chromosomes inherited from the parents, specifically X and Y chromosomes.
  2. Can a baby be male with two X chromosomes? No, a baby is male only if it inherits an X chromosome from the mother and a Y chromosome from the father, resulting in XY.
  3. What role do sperm contribute in sex determination? The sperm contributes either an X or a Y chromosome to fertilize the egg; if Y fertilizes, the baby is male, if X, the baby is female.
  4. How does fertilization influence the baby's sex? Fertilization occurs when a sperm cell reaches an egg, with the chromosome carried by the sperm determining the baby’s sex.

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For more insights on human genetics and parenting, check out our videos on prenatal care and understanding genetic traits. Explore the fascinating world of how our genes shape who we are!

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