The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Question

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is ____.  
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Quizplus · Accepted Answer

When both parents are carriers of an autosomal recessive disorder, there is a 75% chance of producing a child who is either a carrier or not affected at all, and a 25% chance of producing a child with the disorder. This means there is a 75% probability of producing a normal child (either not carrying the gene at all or being a carrier without showing symptoms of the disorder).

The Probability of Producing a Normal Child by Two Parents