Cystic fibrosis is the most common fatal genetic disease in North America and results in what type of allele located on chromosome 7?
A) recessive
B) dominant
C) homozygous
D) heterozygous
E) polygenic

Question

Quizplus · Accepted Answer

Cystic fibrosis is caused by a recessive allele on chromosome 7, meaning that an individual must inherit two copies of the defective allele (one from each parent) to express the disease.

Cystic Fibrosis Is the Most Common Fatal Genetic Disease in North