A woman has only daughters, explain the situation genetically

1.	A woman has only daughters, explain the situation genetically
Answer» This means every time sperm containing X chromosome is fertilized with her during mating. The * of the child is determined at the time of fertilization when male and female gametes fuse to form zygote. The male individual contains one X chromosome and one Y chromosome (XY) and the female individual contains two X chromosomes (XX). Genetically we can prove female have two X chromosomes.If a sperm carrying X chromosome fertilizes an egg then the offspring will be a female child. This is because the offspring will have XX combination of * chromosomes. If a sperm carrying Y chromosome fertilizes an egg then the offspring will be a male child. This is because the offspring will have XY combination of * chromosomes. You will find that the * of the child is determined by the type of sperm that fuses with the ovum at the time of fertilization.Male produces two different kinds of gametes. Half of the gametes having X chromosomes and other half of the gametes having Y chromosomes. Therefore males are heterogametic. Female therefore produces same type of all gametes. So, females are homogametic.If a woman has only daughters, we can understand that every time the male X chromosome only fused with the female X chromosome. And all the offspring with XX combination of *** chromosomes became her daughters.

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