Question

A genetic counselor explains that a couple's child has a 25% chance of inheriting a recessive disorder. What are the parents'
genotypes? (1 point)
Both parents are carriers
Neither parent carries the gene
Both parents are affected
One parent is affected

Answer 1

Both parents are carriers.

Explanation: For an autosomal recessive trait, two heterozygous carriers (Aa × Aa) produce offspring with genotypes 25% AA (unaffected), 50% Aa (carriers), and 25% aa (affected).