. In pea plants, flowers can be purple (dominant allele, A) or white (recessive allele, a). If 75% of alleles in a population are purple (A) alleles, what is the frequency of homozygous recessive plants?

A very large population of rabbits has been allowed to breed randomly in a laboratory research program. The rabbits vary in their coat colour, which is either gray or black. After many generations, 25% of the rabbits display a recessive phenotype for gray coat colour (aa), the same percentage as at the beginning of the breeding program. The other 75% of the rabbits show the dominant black coat phenotype, with heterozygotes (Aa) indistinguishable from the homozygous dominants (AA) What is a reasonable conclusion explaining the fact that the frequency of the recessive trait (aa) has not changed over time? a. There has been sexual selection favouring allele a b. The two phenotypes have about equal fitness under laboratory conditions C. The population is undergoing genetic drift d. The genotype AA is lethal

In pea plants yellow seed color, (GG) and round seed shape (WW) seeds are dominant traits, while green color or (gg) wrinkled shape (ww) seeds are recessive traits. You cross a pure breeding plant with yellow wrinkled seeds to a pure breeding plant with green round seeds to generate F1s. When you perform a reciprocal cross you get the same results. You take an F1 male and an F1 female and generate an F2 population. Of all the F2 offspring you count 18 that have yellow wrinkled seeds. Based on this information, how many F2 offspring do you expect to display only dominant traits? a) 72 b) 54 c) 18 d) 24 e) 6

Parent Generation BB BB Bb Bb Bb Bb Bb Bb bb bb Rabbits with the brown coat color allele (B) are dominant over rabbits with the white coat color allele (b). A small population of rabbits (Parent Generation) has 2 individuals homozygous for B, 6 individuals that are heterozygous, and 2 individuals homozygous for b. What would you predict the frequencies of alleles B and b to be in the next (first) generation if this population is not evolving Edit View Insert Format Tools Table