Question

If A is a sex influenced trait that is more expressed in males, then which of the following is false?

(a) Only male having a homozygous recessive form of this gene will not express it

(b) No female will express the gene

(c) The gene is autosomal

(d) Heterozygous female will not express this gene

I got this question by my school teacher while I was bunking the class.

The query is from Sex Influenced Traits and Sex Limited Traits in portion Chromosomes and Sex Determination of Cytogenetics

Answer 1

Correct option is (b) No female will express the gene

The best explanation: If the sex influenced trait is more expressed in men then it acts as a dominant trait in men. And at the same time, it acts as a recessive trait in female. The female with homozygous form of this trait will thus express it, and men lacking any copy of it in case of recessive homozygote will not express it.