In: Biology
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
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).