Question

In: Biology

More males are affected by a disease with this inheritance pattern A. autosomal dominant B. X-linked...

More males are affected by a disease with this inheritance pattern

A. autosomal dominant

B. X-linked recessive

C. X-linked dominant

D. Y-linked

E. none of these

Solutions

Expert Solution

Ans) The correct answer is "D" i.e Y-linked

(More males are affected with the Y-linked inheritance pattern.If the father has affected allele is present on the Y-chromosome then all the sons will be affected because we know that in the sons, Y-chromosome comes from the father and X-chromosome comes from the mother.This is the reason that all the sons are affected if the father is affected in Y-linked inheritance)

Option A is incorrect because the autosomal inheritance pattern does not involve with the sex chromosomes.

Options B and C are incorrect .They can affect more males but less than Y-linked inheritance. Males are more likely to be affected by X- linked inheritance because the males have only 1 X chromosome wheras females have 2 X-chromosome and thus if the females inherit 1 faulty X-chromosome,they still have the second normal X-chromosome to mask the effect of faulty X-chromosome).


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