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Chapter 21.3, Problem 2CC

Distinguish genetic drift from gene flow in terms of (a) how they occur and (b) their implications for future genetic variation 1n a population.

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. (07.07 HC) Darwin explored the Galapagos Islands and observed variations of certain species. For example, he saw that the mockingbirds on three different islands were distinct but still similar to the mockingbirds found on the mainland. The level of diversity in an ecosystem can be determined by the frequency of speciation and extinction. (8 points) a. Describe speciation and identify two possible prezygotic barriers of the mockingbirds that contribute to speciation. b. If the mockingbirds became extinct, explain how this could lead to adaptive radiation.
Please fill in the blank ———- mutations are the most common...
Genetic equilibrium means that ... O the distribution of alleles is not changing from generation to generation The distribution of alleles is changing from generation to generation O the gene pool is not affected by a catastrophic event O the gene pools is not affected by selective agents

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Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY