Two healthy parents who carry the same abnormal autosomal recessive gene have what percentage chance of having a child affected with the disorder caused by this gene? Record your answer as a whole number. _____%
Fill in the blank with correct word.
ANS:
25
Two healthy parents who carry the same abnormal autosomal recessive gene have a 25%
chance of having a child affected with the disorder caused by this gene. Unaffected
parents are carriers of the abnormal autosomal recessive trait. Children of carriers have a
25% (1 in 4) chance of receiving both copies of the defective gene and thus having the
disorder.
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