Question

If a mother carries a recessive allele for a genetic disorder, such as cystic fibrosis, under what circumstances will her children inherit the disorder?
A) The children's father must also carry the recessive allele.

B) The mother's father must also carry the recessive allele

C) The paternal grandfather must also carry the recessive allele.

D) The children must be female like the mother to inherit the disorder

Answer 1

Answer: B) The mother's father must also carry the recessive allele

Explanation:

How Are Men Affected by Cystic Fibrosis? Males account for slightly more than 50 percent of all cases of cystic fibrosis (CF) but generally have better outcomes than females until about age 20.