Q. 2

What determines the sex of a child?
A. Chromosome content of the ovum

B. Chromosome content of the sperm

C. Number of days between ovulation and fertilization

D. Number of days between fertilization and implantation

Answer :

XX : mother


XY : father


The mother always contributes one X chromosome to the sex of the baby while the father may contribute either an X or Y chromosome. When the father contributes Y chromosome, the baby born is a boy as the set of chromosome he will have would be XY and, if the father contributes X chromosome, the progeny will be a baby girl.

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