Question

Females who are carriers have a healthy copy of the gene to mask defective gene on X-chromosome. True or false?

• A. True
• B. False

Answer 1

The correct option is A

True

Sex-linked disorders can be linked to either the X chromosome or the Y chromosome.

Males have a single X-chromosome, if they have the defective gene, they will be affected as they do not have a healthy copy of the gene (healthy allele) to mask the defective allele.

Females having one copy of the defective gene on X-chromosome become carriers since they have a healthy copy of the gene to mask it.