Answer:
The correct answer would be option A.
In humans, the gender of a child is mainly determined by the sex chromosome inherited from the father.
It is because human females are homozygous (XX) in terms of sex chromosome. So, their gamete will always contain an X chromosome.
In contrast, human males are heterozygous, that is, they contain XY as sex chromosome. Thus, they will produce two types of gametes of which one would contain X and the other one would contain Y.
When the male gamete containing X chromosome fuse with female gamete, the offspring produce would be a girl and when the male gamete containing Y chromosome fuse with female gamete, the offspring produce would be a boy.
