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.
