Meiosis and Genetic Diversity

AP Biology· difficulty 3/5

Independent assortment of homologous chromosomes during metaphase I contributes to genetic diversity by

  • A

    Forcing each pair to align identically every division, producing uniform gametes

  • B

    Splitting sister chromatids randomly between the two daughter cells

  • C

    Allowing each pair to align independently of other pairs, generating 2ⁿ combinations

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  • D

    Doubling the DNA content before homologous chromosomes separate

Explanation

Each homologous pair orients randomly. With 23 pairs in humans, 2²³ ≈ 8.4 million combinations from independent assortment alone.

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