Q63 of 167 Page 193

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

Baby Girl

The mother already has X chromosome in the unfertilized egg. When a sperm, carrying X from the father will fertilize the egg, the combination would be XX and thus a baby girl will develop.

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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

 62

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

 64

Which of the following statement is incorrect?

 65

If the ratio of each phenotype of the seeds of pea plants in the F2 generation is 9 : 3 : 3 : 1, it is known as :