The chromosomal constitution of the father is XY and that of the mother is XX. Each parent contributes half of their chromosomes to enable the child to have a diploid chromosomal constitution. The mother only possesses X chromosomes, and the ovum will carry one X chromosome. The father, however can either contribute an X or Y chromosome which is carried in the sperm. Contribution of the X chromosome will result in XX(girl) and if he contributes Y then the result will be XY(boy)
Chiry answered the question on November 12, 2017 at 22:33
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