Imagine you have two pure-breeding lines of canaries, one with yellow feathers and the other with brown feathers. In crosses between these two strains, yellow female X brown male gives only brown sons and daughters, while brown female X yellow male gives only brown sons and yellow daughters. Propose a […]

Q1. Describe how the presence of the appendix might be used to explain our common ancestry with other mammals, and determine what it may tell us about the dietary history of humans. Give an example with the response. Q2. Species have been traditionally characterized as “primitive” and “advanced.” For example, […]

1. Mary noticed a large, brown spot on her skin. She has been playing tennis in the sun for several years without sun protection. She reported the discovery to a friend, who told her to apply the ABCD rule to determine whether or not she had malignant melanoma. Her friend […]

The vocal, claw and hair genes of H. flebotomos all are on the same chromosome. The vocal gene is 15 cM to the left of the claw gene and the hair gene is 30 cM to the right of the claw gene. Based on the three-factor data shown below, how […]