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Do the father's or the mother's genes determine the sex of a baby?

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Technically, the father determines the sex of the offspring. There are two sex chromosomes: the "X" and the "Y". If an embryo has "XX", it will develop into a female, while the "XY" combination results in a male offspring.

To understand why, a little knowledge of Miosis is needed (this is the process by which sex cells are created (eggs and sperm)). Miosis is related to Mitosis, in that the end result is the creation of two cells from one. Miosis, however, ensures that half the genetic material is handed to each "daughter" cell, while Mitosis results in equal and even distribution (cock) of genetic material.
If all men are "XY" (they are), then the process is pretty straightforward: Each of the sperm must have half the normal genetic material. This means that each must have either an "X" or a "Y" chromosome. If you're a dude, 50% of the sperm will result in male offspring, and 50% will result in female. Females have two "X" chromosomes, so even when only half is replicated, there's a 100% chance an "X" is present. Everyone needs two sex chromosomes to grow, so, therefore, if 100% of the time the mom is giving an "X", and half the time the pop is shooting "X"'s and "Y"'s, it's fully the dad's genes that decide of the offspring is male or female.
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When is the sex of a baby determined?

When is the sex of a baby determined?

when the egg and sperm connect the sperm has either an x or y chromosome y makes a boy x makes a girl so XX-girl XY-boy

How is a baby sexs determine?

The babies sex is determined by the sperm. The egg has XX chromosome and each sperm cell is either a XX or XY chromosome. So which ever sperm cell reaches the egg and implants
Which parents determine the sex of a baby?

Which parents determine the sex of a baby?

The father's genetic contribution determines the sex of the baby. Women have XX chromosomes, men have XY (this is part of the definition of female and male). The male provides

When can a sonogram determine the babys sex?

  Answer   The most accurate time is between 18-22 weeks. Anything before 18 weeks is more of a guess, and anything after 22 weeks the baby might be too big to see b
Sex determination in the unborn baby?

Sex determination in the unborn baby?

It mainly depends upon the sex chromosomes.i.e, Y chromosome and X chromosome.

Which chromosome determines the sex of a baby?

Answer   The sperm from the father can supply either an X-bearing or a Y-bearing chromosome. The egg from the mother can only supply an X-bearing chromosome. An XY combin

How do men determine the sex of a baby?

Because men have chromosomes that are XY- X being female Y being male. Females only have chromosomes that are XX -both which are female. So the male having female and male chr
What is my father's mother's sister's brother's mother's fathers' sister's baby called?

What is my father's mother's sister's brother's mother's fathers' sister's baby called?

your father is your father and your fathers mother is your grandmother and her sister is your great aunt and your grandmas brother is your great uncle and since their brother
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How is the sex of an unborn baby determined?

There are basically two ways (1) Invasive technique such as a process known as anmiocentisis, which can be used to determine the sex of the fetus and if there is any genetic
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What is the gene that determines the sex of an offspring?

With people, girls have XX and guys have XY chromosomes. ---------------------------------------------------------------------- This mechanism of how this genetic sex dete