Question

In order for a child to have cystic fibrosis, it must inherit the:

1) cystic fibrosis gene from each parent
2) Cystic fibrosis gene from its mother
3) Cystic fibrosis gene from its paternal grandmother
4) Cystic fibrosis gene from its maternal grandmother

Answer 1

A child must inherit the cystic fibrosis gene from each parent in order to have cystic fibrosis.

Step-by-step explanation:

Cystic fibrosis is an autosomal recessive genetic disease caused by a mutation in the CFTR gene. To have cystic fibrosis, a child must inherit two copies of the faulty gene, one from each parent.

Therefore, the correct answer is option 1) the child must inherit the cystic fibrosis gene from each parent.