Studies of Enzyme Genotypes and Flight in Colias Butterflies Showed

Multiple Choice

Studies of enzyme genotypes and flight in Colias butterflies showed that

A) males that are heterozygous for the PGI gene have greater mating success than homozygous males because they are able to fly farther in a broad range of temperatures.
B) males that are heterozygous for the PGI gene are always inferior in flight compared to homozygotes.
C) genotypes for the PGI gene do not affect flight ability.
D) flight ability and mating success are not correlated.
E) flight ability can be explained by Muller's ratchet.