1. Tasmanian devils once inhabited most of present day Australia, but only an is

Question

1. Tasmanian devils once inhabited most of present day Australia, but only an isolated population on the island of Tasmania has survived to present day. Which of the following processes has likely affected Tasmanian devils as a result of this history: (a) a higher mutation rate (b) stronger natural selection (c) a genetic bottleneck (d) gene flow 2. The effeciveness of selection on an alle depends in par on (a) the frequency of the allele (b) the magnitude of average excess fitness (c) the average fitness of the population (d) all of the above (e) none of the above

Explanation / Answer

Tasmanian devils are endangered and have become an isolated population on the island of Tasmania due to a genetic bottleneck (Devil Facial Tumour Disease). Once a devil has been infected with the disease it usually dies within six months due to secondary infection, organ failure, or by the inability to feed.

The Hardy-Weinberg Theorem shows that the effectiveness of selection depends on the frequency of an allele.

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