Question

You observe a genetic trait which is a common occurrence in the male of a particular pedigree, this is possibly a ______________

(a) X linked

(b) Y linked

(c) X linked recessive

(d) Y linked dominant

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

I want to ask this question from Chromosomal Theory of Inheritance topic in portion Chromosomal Basis of Inheritance of Cytogenetics

Answer 1

Right answer is (b) Y linked

Best explanation: If the gene has a sex bias it is certainly sex linked. In this case, it is a common occurance in the males only in a pedigree so it must be Y linked gene. There is no dominant recessive as Y is always hemizygous.