Spermatogenesis and Meiosis
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Questions and Answers

What is the ploidy level of primary spermatocytes?

  • Triploid (3n)
  • Tetraploid (4n)
  • Diploid (2n) (correct)
  • Haploid (n)
  • How many chromosomes does a secondary spermatocyte have?

  • 69 chromosomes
  • 23 chromosomes (correct)
  • 92 chromosomes
  • 46 chromosomes
  • Which process occurs after the DNA of a primary spermatocyte replicates?

  • Meiosis I (correct)
  • Cytokinesis II
  • Meiosis II
  • Mitosis
  • What developmental change do spermatogonia undergo to become primary spermatocytes?

    <p>Fusion with other cells</p> Signup and view all the answers

    How many cells are produced from one primary spermatocyte undergoing meiosis I?

    <p>Two haploid cells</p> Signup and view all the answers

    Study Notes

    Spermatogenesis

    • Spermatogonia that lose contact with the basement membrane undergo developmental changes and differentiate into primary spermatocytes after crossing the blood-testis barrier
    • Primary spermatocytes are diploid, having 46 chromosomes
    • Primary spermatocytes replicate their DNA and initiate meiosis I
    • Meiosis I results in the formation of two secondary spermatocytes
    • Each secondary spermatocyte has 23 chromosomes, the haploid number (n)

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    Description

    This quiz covers the process of spermatogenesis, including the formation of primary and secondary spermatocytes and the role of meiosis I. It's a fundamental concept in reproductive biology and genetics.

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