In rats, gene B produces black coat color if the genotype is…
In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the genotype is bb. At an independent locus, gene D produces yellow pigment if the genotype is D-, but no pigment is produced when the genotype is dd. Production of both pigments results in brown coat color. If neither pigment is produced, coat color is cream. The genotype of parents of litters with the following phenotype distribution 3 brown, 3 yellow, 3 black, 3 cream is:
Read DetailsA scientist studying population genetics of a bird populatio…
A scientist studying population genetics of a bird population inhabiting a group of islands finds that allelic diversity is highest on island C, lowest on island A, and island B has intermediate allelic diversity levels. What is the likely order in which these islands were colonized by this species?
Read DetailsWild type blue-eyed Mary has blue flowers. Two genes control…
Wild type blue-eyed Mary has blue flowers. Two genes control the pathway that makes the blue pigment: The product of gene W turns a white precursor into magenta pigment. The product of gene M turns the magenta pigment into blue pigment. Each gene has a recessive loss-of-function allele: w and m, respectively. A double heterozygote is self-pollinated. What proportion of offspring will be white?
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