problem_set_4__f07

problem_set_4__f07 - Problem Set 4 Biocore 301, Fall 2007...

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1 Problem Set 4 Biocore 301, Fall 2007 15 Points, Due in Lecture, October 26 Name: __________________________ Disc section: _______________ 1. (3 points) Summer squash plants with the dominant C allele bear white fruit, whereas plants homozygous for the recessive c allele bear colored fruit. When fruit are colored, the dominant G allele causes it to be yellow. In the absence of this allele (that is, the genotype is gg ) the fruit color is green. You cross CC GG plants to cc gg plants to obtain F 1 plants of the genotype Cc Gg plants. a. What color are the fruits of F 1 plants? _________________________________ b. You self-pollinate F 1 plants. Assume that the C and G genes assort independently. Diagram the Punnett Square for the F 2 generation. c. What phenotypes do you expect in the F 2 population and in what proportions do you expect them to occur? 2. (3 points) Two parents are each heterozygous for the recessive gene for sickle-cell disease. What is the probability that, if they have three children:
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problem_set_4__f07 - Problem Set 4 Biocore 301, Fall 2007...

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