Class 12 NEET Biology Principles of Inheritance and Variation Questions Part 2

Traits governed by sex-linked recessive genes are :
(a) produce disorders in males more often than in females,
(b) express themselves in males even when represented by a single allele because Y chromosome does not carry any corresponding alleles,
(c) seldom appear in both father and son,
(d) fail to appear in females unless their father also possesses the same and the mother is a carrier,
(e) female heterozygous for the trait function as carrier and
(f) female homozygous for the recessive trait transfer the trait to all the sons.
Take the example of colour blindness which is a recessive sex-linked trait, In the question, as man and woman do not show any signs of disease, so man must be normal and woman must be carrier.