Principles of Inheritance and Variation Question 135

135. Sex is determined in human beings

[1993]

(a) by ovum

(b) at time of fertilization

(c) 40 days after fertilization

(d) seventh to eight week when genitals differentiate in foetus

Show Answer

Answer : b

Hints & Solution

(b) Sex of human body is determined by the karyotype of the zygote or fertilised egg. Sex of the baby depends upon the sperm which fertilises the ovum.