If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of you having cystic fibrosis are ____.
A) 1/4
B) 1/2
C) 3/4
D) 1
E) 0

Question

Quizplus · Accepted Answer

Since cystic fibrosis is caused by a recessive allele, both parents having the condition means they each have two copies of the recessive allele. Therefore, all of their offspring will inherit one recessive allele from each parent, resulting in the offspring having cystic fibrosis.

If Your Mother and Father Both Have Cystic Fibrosis, Which