2018 Principles of Inheritance and VariationSex-linked inheritance Easy Question 1 of 10 in Sex-linked inheritance

A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by

A Only grandchildren
B Only sons
C Only daughters
D Both sons and daughters

The answer is D.

Solution

Each child receives one of the mother's X chromosomes.

The woman is a carrier. Both sons and daughters inherit an X chromosome from the mother. However, only sons would be diseased.

Concept x-linked-inheritance

Sex-linked inheritance in past papers

10 questions from this chapter have appeared across 8 exam years.