In a population of chicken, three color morphs defined by two alleles occur: dark brown with genotype BB, light brown with genotype Bb, and white with genotype bb. A breeder takes only the light brown chickens for a new breeding group and then let the chickens select their partners. If […]

There is an island in the Adirondacks with a population of 89 rabbits. Each year 48 rabbits are born. Ten baby rabbits are eaten by snakes on the island, 25 rabbits are eaten by wolves, 7 die of old age, 4 are inadvertently stepped on by moose and killed, and […]

Q. After Drosophila DNA has been treated with a restriction enzyme, the fragments are attached to plasmids and selected as clones in E. coli. By using this “shotgun” technique, David Hogness recovered every DNA sequence of Drosophila in a library. a. How would you identify the clone that contains DNA […]

Avise’s book The Hope, Hype and Reality of Genetic Engineering. In its short history, genetic engineering (GE) has attracted much controversy. Proponents of GE claim humans have no choice but to develop it for solving problems related to overpopulation, including environmental degradation; critics charge the promise of GE is overblown […]