a). By itself, is mutation a strong evolutionary force? b). You are studying a p

Question

a). By itself, is mutation a strong evolutionary force? b). You are studying a population of kangaroo rats on the Pawnee (yes, they really do live out there), Of the 50 alleles sampled from individuals, 19 are the long whiskers allele (W) and 31 are the short whiskers allele (w). There is a constant mutation rate of 103 or 0.001 from the W-w allele. Mutation is the only source of new variation (no migration, selection or drift). What are the new allele frequencies after mutation? 3. [5 points] You are studying a small population of horned lizards. At two loci you find an excess of heterozygotes and at two other loci you find an excess of homozygotes. Come up with a hypothesis as to why you should see such a pattern.

Explanation / Answer

a) Mutation. Mutation is a change in the DNA at a particular locus in an organism. Mutation is a weak force for changing allele frequencies, but is a strong force for introducing new alleles. Mutation is the ultimate source of new alleles in plant pathogen populations.

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