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 (A)</p> Signup and view all the answers

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

<p>Two haploid cells (D)</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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