The combination of an egg and a sperm But when it comes to what determines the sex of a baby, only two of those chromosomes in that initial cell play a role At the moment of fertilization, one chromosome from the sperm and one from the egg determine the sex of the baby. The best bet is to simply hope for a happy, healthy child, no matter what gender that child might be. This genetic arrangement determines a baby’s sex at conception The interplay of these specific chromosomes governs the initial developmental path
The male parent’s decisive role the biological sex of a baby is determined at the moment of conception by the combination of sex chromosomes inherited from both parents. A baby’s sex is determined at conception, but sex organs develop later on, particularly between weeks 7 and 12 of pregnancy. How biological sex is determined to understand how a baby's sex develops in the womb, it helps to start with the basics of genetics and the sex determination system Endocrinologist lisa becht explains that in many species, including humans, chromosomes determine sex. Learn which parent determines the sex of a baby Explore the science of genetic inheritance, how chromosomes play a role, and the factors influencing baby's gender.
The father determines whether a baby will be a boy or a girl.
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