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It is because males produce sperm cells with the X chromosome and sperm cells with the Y chromosome. If a sperm cell with a Y chromosome fertilizes an egg, then that child would be a boy, as the Y chromosome produces male offspring. If a sperm cell with a X chromosome fertilizes an egg, then the child would be a girl, as X is the female chromosome. The mother always passes on a X chromosome, but the father can pass on an X or a Y and thus determine the sex of the baby.
Wiki User
∙ 10y ago
Wiki User
∙ 14y agoIf it is a boy, the two chromosomes are "XY"
If it is a girl, the two chromosomes are "XX"
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How are chromosomes organized?
Girl Boy Girl Boy
What what are sex chromosomes?
XX for a girl and XY for a boy
What are the 2 sex chromosomes?
XX for a girl and XY for a boy
Is this sentence true or false. Genes on chromosomes determine whether a baby is a boy or girl?
A child's sex is determined if he has XY chromosomes or she has XX chromosomes. So in general the statement is true.
Do genes on a chromosomes determine whether a baby is a boy or a girl?
yes particular one's do which are the xy chromasones
How are chromosomes organized?
Girl Boy Girl Boy
Do x and x chromosomes make a baby girl?
yes and xy makes a boy
How do you get chromosome?
boy meets girl, girl meets boy the baby gets chromosomes
What what are sex chromosomes?
XX for a girl and XY for a boy
What decides if a baby going to be a boy or a girl?
The chromosomes in the sperm determine whether the baby is going to be a girl or boy.
What are the 2 sex chromosomes?
XX for a girl and XY for a boy
Can parents pick if they want a boy or a girl?
Unfortunately, no they cannot. It depends on the mother chromosomes (XX) and the father chromosomes(XY). The chromosomes from the father is basically the only chromosomes to detect the sex of the baby. Boy or Girl. If a mother's X chromosome meets with the fathers X chromosome, it will be a girl. If a mothers chromosome X meets with the father Y chromosome, it will be a boy.
Why am i a boy shouldn't i be a girl?
You are a boy because your sex chromosomes shows XY, which is what you have inherited from your parents.
Why is a girl a girl instead of a boy?
If a baby gets one X and one Y chromosome, it is a boy. If it gets two X chromosomes, it is a girl.
How do chromosomes make cells different?
Chromosomes desides a lot of things about the offspring. It could be a boy (XY) or a girl (XX). They can give babies diseases or red hair, short legs or cleft palettes etc.
How do you be a boy on It Girl on Facebook?
You can not make a boy avatar on It Girl. Even if a boy plays, they can only make girl avatars.
What are the chances of having a girl or boy?
1. The Chances of having a baby boy and a baby girl is 50/50 because the girls have XX Chromosomes and Boys have XY Chromosomes it's a 50% chance that it sprays some liquid to get the Y Chromosomes so either way its 50/50 chance
