a) the individual has cystic fibrosis, and can pass it on to their children.
b) the individual has cystic fibrosis, but cannot pass it on to their children.
c) the individual does not have cystic fibrosis, but can pass it on to their children
d) the individual does not have cystic fibrosis, and cannot pass it on to their children

Cystic fibrosis is a genetic disease caused by recessive alleles.

Albinism is a condition caused by a recessive allele. A carrier of the albino trait and a non-carrier marry and are planning to start a family. What will be the genotypic ratio for their children? What is the percent chance that they will have albino children?

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) 0.022 = 0.0004
B) 0.98
C) 2(0.02 × 0.98) = 0.0392
D) 0.982 = 0.9604
E) 0.02

Large antlers in male elk, which are used for battles between males, are a good example of a trait favored by
A) stabilizing selection.
B) intrasexual selection.
C) directional selection.
D) intersexual selection.
E) disruptive selection.

CF. What can you conclude about the parents?

A. they are both homozygous dominant for the CF gene.

B. they are both homozygous recessive for the CF gene.

C. one is homozygous dominant for the CF gene, the other is heterozygous.

D. one is homozygous recessive for the CF gene, the other is heterozygous.

E. they are both heterozygous for the CF gene

…….has CF. If this couple has another child, what is the probability he or she will NOT have CF?

a. 3/4
b. 2/3
c. 2/4
d. 1/3
e. 1/4