The Recessive Allele of a Gene Causes Cystic Fibrosis

Multiple Choice

The recessive allele of a gene causes cystic fibrosis. For this gene among Caucasians, p = 0.98. If a Caucasian population is in Hardy-Weinberg equilibrium with respect to this gene, what proportion of babies is born homozygous recessive and therefore suffers cystic fibrosis?

A) (0.02) 2 = 0.0004
B) 0.02
C) (0.98) 2 = 0.9604
D) 2(0.02 × 0.98) = 0.0392