Q62 of 167 Page 193

The sex of a child is determined by which of the following?

The presence of Y chromosome in sperm.

If sperm carries a Y chromosome and fertilizes with egg (having an X chromosome) the sex of the child will be male. But if the sperm carries a X chromosome and fertilizes with egg the sex of the child will be female.

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60

A trait in an organism is influenced by:

 61

In human males all the chromosomes are paired perfectly except one. This /these unpaired chromosome is/are:

(i) Large chromosome


(ii) Small chromosome


(iii) Y chromosome


(iv) X chromosome

 63

A zygote which has inherited an X chromosome from the father will develop into :

 64

Which of the following statement is incorrect?