Question

A single recessive allele which can express its effect should occur on ______________.

• A. Any autosome
• B. Any chromosome
• C. X-chromosome of female
• D. X-chromosome of male

Answer 1

The correct option is D X-chromosome of male

X-linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype to be expressed in males (who are necessarily hemizygous for the gene mutation because they have one X and one Y chromosome).

So, the correct answer is 'X-chromosome of male'.