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Meiosis Transitional Reasoning Practice

Biology · Heredity · Biology · Meiosis & Sexual Reproduction

1 Biology practice questions on Meiosis. Questions that build towards applied reasoning.

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Questions

  1. 1.

    A cytogeneticist tracks a single primary spermatocyte undergoing complete meiosis in an animal species with a diploid chromosome number of 2n=122n = 12. During this specific meiotic division, maternal and paternal homologous chromosomes align and segregate normally, but no crossing over occurs between non-sister chromatids. Based on this observation, which deduction correctly describes the resulting spermatids formed from this single cell?

    • A) Four genetically unique spermatids are produced, each possessing 6 pairs of replicated sister chromatids.
    • B) Each resulting spermatid contains 12 unreplicated chromosomes due to the absence of genetic exchange during prophase I.
    • C) Four genetically unique spermatids are produced because independent assortment simultaneously expresses all 64 possible combinations in this single division.
    • D) Only two genetically distinct types of spermatids are produced, each containing 6 unreplicated chromosomes.

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