Question

Expression of recessive genes on X-chromosome occurs in males because of.

• A. Hemizygous condition
• B. Homozygous nature
• C. Polyzygous nature
• D. Inverted condition

Answer 1

The correct option is A Hemizygous condition

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) and in females who are homozygous for the gene mutation.

So, the correct answer is 'Hemizygous condition'.