Principle Of Inheritance And Variation Question 52

Question: In man sometime during gametogenesis sex chromosomes are not separated themselves on account of which chromosome number becomes 45, 47 or 48. In this condition which of the following genotype and phenotype is correct

Options:

A) 22 pairs + XXY males

B) 22 pairs + XX females

C) 22 pairs + XXXY females

D) 22 + Y females

Show Answer

Answer:

Correct Answer: A

Solution:

22 pairs + XXY genotype is the result of fertilization of an ovum containing 22 + XX chromosomes which may be formed as a result of non-disjunction of X chromosome during oogenesis.