We know that for the formation of an embryo, there is the requirement of fertilization.
And the chromosomes in the male gamete (X or Y) and female gamete (only X) determines the gender of the baby ..
My Question is, if we take 2 Ovums, we can make a girl child.
If we take 2 sperms, we can make a boy or a girl.
Then, where is the requirement of a sperm to fertilize an egg?
Is there some special criteria for each which makes the birth possible?

Dear Student

​In human beings, the females have two X chromosomes and the males have one X and one Y chromosome. Therefore, the females are XX and the males are XY.

The gametes, as we know, receive half of the chromosomes. The male gametes have 22 autosomes and either X or Y sex chromosome.

Type of male gametes: 22+X OR 22+ Y.

However, since the females have XX sex chromosomes, their gametes can only have X sex chromosome.

Type of female gamete: 22+X

Nature has not made it possible for humans to fuse two ovums or two sperms together to form a girl or a boy respectively.

Sex determination in humans is governed by the method mentioned in the first paragraph.

Thus, the mother provides only X chromosomes. The sex of the baby is determined by the type of male gamete (X or Y) that fuses with the X chromosome of the female.

Regards

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Y chromosome comes from sperm.
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