Question

Many biologists believe that genetic drift is a major cause of _________

Answer 1

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Random changes in allele frequencies in small populations are known as genetic drift. Many biologists think that genetic drift is a major cause of microevolution. ... Because chance governs meiosis and fertilization, random variations can influence allele frequencies, especially for small populations.

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Answer 2

$\huge\green\dag$microevolution$\huge\green\dag$