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Both eye color and leg length are inherited in a dominant-recessive fashion in fruit flies. Fruit fly wings can either be wildtype (P), or have purple eyes (p), and either wildtype (S) or have short legs (s). Fill in the Punnett Square for this scenario. If you cross a female […]

Mary’s grandmother slipped on a scatter rug and fell heavily to the floor. Her left lower limb was laterally rotated and noticeably shorter than her right, and when she attempted to get up, she winced with pain. Mary surmised that her grandmother might have “fractured her hip,” which later proved […]

Q1. What role do you think people have to play in preserving those regions threatened by human encroachment? How must the interests of competing groups be balanced? Q2. Natural selection tends to choose against deadly genetic disorders such as Tay-Sachs disease and PKU. If this is the case, why are […]

Your friend is studying mouse fur color and has isolated the GPCR responsible for determining its color, as well as the extracellular signal that activates the receptor. She finds that, on addition of the signal to pigment cells (cells that produce the pigment determining fur color), cAMP levels rise in […]