Exam1_2012KEY

Find the divergence time for two mustard fly species

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Unformatted text preview: lection? Explain your reasoning in a sentence or two (2 points). Evolution is a change in allele (or gene or genotypic) frequencies across generations. Yes, evolution can occur without natural selection because genetic drift can cause allele frequencies to change from generation to generation. There are other possibilities. 19. FST between two island populations is 0.1. What is the effective number of migrants between these two populations in one generation? Make sure you indicate the units (2 points). Nm = ((1/FST) –1)/4 = ((1/0.1)  ­1)/4 = 10/4 = 2.5 migrants per generation. 20. What is the probability (or chance) that a new, neutral mutation will be fixed in a diploid population with an effective size of 5,000 breeders (2 points)? 6 ECOL 335 Evolutionary Biology NAME_____KEY________________ Sect#_____ Exam 1 Spring 2012 Feb 9 2012 [Pr] = 1/(2N) = 1/10,000 = 0.0001 21...
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