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6 answers

Females are XX, so they give one X to each child.

Males are XY, so they give each child either the X or the Y.
--If they give X, child is female XX.
--If they give Y, child is male XY.

2007-01-23 12:50:45 · answer #1 · answered by ecolink 7 · 4 0

The sex or gamete cell of the female is the chromosome XX
The sex or gamete cell of the male is the chromosome XY
you get one sex chromosome from each parent-the sperm from the father and the egg from the mother
the female gives the gametes X and X
the male gives the gametes X and Y
so the offspring recieves an X from their mother no matter what
what determines the sex of the offspring is whether a sperm with the X chromosome or Y chromosome enters the egg first. If it's X then you will have a female baby, if it's a Y then you will have a male

2007-01-23 15:11:48 · answer #2 · answered by Anonymous · 0 0

Males have an X and a Y chromosome. the sperm may contain either an X or a Y chromosome. Females have 2 X chromosomes, so ova will contain only an X chromosome. If you look at all the possibilites, they are XY (2) which is male or XX (2) which is female. it is the male contributing the X or Y chromosome so they are effectively determining the sex of the offspring.

2007-01-23 12:51:23 · answer #3 · answered by Yobbomate 2 · 4 0

If I remember my biology class, the Male's sperm carries both XX and XY chromosomes in order to predict the sex of the baby. If the male wants a boy for example then he has to produce better XX sperm. For a girl, it's XY. The women's egg is a basic XX chromosome right from gestation. So in a way it is the males that can determine what sex the baby is. Hopefully this helped.

2007-01-23 12:53:23 · answer #4 · answered by Brian W 2 · 0 5

This is a very informative thing to watch about conception and birth.
http://www.pbs.org/wgbh/nova/miracle/program.html

2007-01-23 12:53:14 · answer #5 · answered by darpunzel 4 · 0 1

the female egg is always the same chromosome, y. the male sperm can be an x or a y chromosome. two y's and you have a female, xy you have a male child.

2007-01-23 12:48:57 · answer #6 · answered by grouch2111 6 · 0 5

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