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PS2 - Biology 60b Evolution Problem Set 2 Hardy-Weinberg...

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Biology 60b Evolution Problem Set 2 Hardy-Weinberg Equilibrium Please show all work. 1. The trait “vestigial wings” in the fruit fly Drosophila results from a recessive mutation, vg - . Assuming that the population is in Hardy-Weinberg Equilibrium, what is the frequency of heterozygotes ( vg + /vg - ) in a population whose frequency of vestigial winged flies is 1 in 10,000? 2. Industrial melanism is the process by which moths become more darkly colored in response to increased pollution. Kettlewell studied industrial melanism in the peppered moth ( Biston betularia ). In most cases in which the genetic basis of industrial melanism has been analyzed, the melanic (dark) color pattern has been found to be due to a single dominant allele. In one study of a polluted area around Birmingham, UK, Kettlewell observed a frequency of 87% melanic Biston betularia . Determine the frequency of the dominant allele leading to melanism in this population, and the frequency of melanics that are heterozygous.
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