When a set of parents has a child affected by an autosomal recessive disorder, the most likely recurrence risk is:
A) 100%
B) 50%
C) 33%
D) 25%
E) 12.5%

Question

Quizplus · Accepted Answer

In autosomal recessive disorders, both parents must be carriers of the defective gene. Each child has a 25% chance of inheriting both copies of the defective gene, one from each parent, which would result in the disorder.

When a Set of Parents Has a Child Affected by an Autosomal