question_answer

Directions : (31 - 35)

Read the passage given below and answer the following questions.

The sex of the baby has been decided at the stage of fertilization. The chromosome pattern in the human female is XX and that in the male is XY. Therefore, all the haploid gametes produced by the female, i.e. ova have the sex chromosome X whereas in the male gametes or sperms the sex chromosome could be either X or Y, hence 50 per cent of sperms carry the X chromosome, i.e. gymnosperm while the other 50 per cent carry the Y, i.e. androsperm. After fusion of the male and female gametes the zygote would carry either XX or XY depending on whether the sperm carrying X or Y ferilised the ovum. The zygote carrying XX would develop into a female baby and XY would form a vole. That is why scientifically it is correct to say that the sex of the baby is determined by the father and not by the mother.

Sex of the baby is decided at. The

A) Stage of spermatogenesis

B) Stage of oogenesis

C) Stage of fertilization

D) Stage of implantation