quiz11 - Biol241, Quiz 11 4/23/10 [Questions 1 and 2 are a...

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Biol241, Quiz 11 4/23/10 [Questions 1 and 2 are a set] Flower diameter in sunflowers is a quantitative trait. A plant with 6-cm flowers, from a highly inbred strain, is crossed to a plant with 30-cm flowers, also from a highly inbred strain. The F 1 have 18-cm flowers. F 1 x F 1 crosses yield F 2 plants with flowers ranging from 6 to 30 cm in diameter, in approximately 4-cm intervals (6, 10, 14, 18, 22, 16, 30). 1. The number of different genes influencing flower diameter in this plant is: a) 3 b) 4 c) 5 d) 6 e) 7 2. An 18-cm F 1 plant is crossed to a 6-cm plant. What is the probability of an offspring with one additive allele, if all genes that influence this trait are unlinked? a) 1/3 b) 1/4 c) 1/6 d) 3/8 e) 1/16 3. A mutation in E2F that specifically disrupts the binding of E2F to pRB is expect to: a) Dominantly promote cell proliferation. b) Dominantly prevent cells from entering the S-phase. c) Recessively promote cell proliferation.
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quiz11 - Biol241, Quiz 11 4/23/10 [Questions 1 and 2 are a...

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