Spermatogenesis

    Cards (12)

    • Spermatogenesis
      Formation of spermatozoa
    • What is the male gamete in humans known as?
      Spermatozoa
    • How many spermatozoa does each primordial germ cell result in?
      Each primordial germ cell results in large numbers of spermatozoa
    • Order of cell formation in spermatogenesis
      • Primordial germ cell
      • Spermatogonia
      • Primary spermatocyte
      • Secondary spermatocytes
      • Spermatids
      • Spermatozoa
    • Process of spermatogenesis
      • Primordial germ cell undergoes several rounds of mitosis to form spermatogonia
      • Spermatogonia undergo growth but no division (with a longer G1 phase) to form a primary spermatocyte
      • The primary spermatocyte undergoes half of a meiosis (P1,M1,A1,T1) to form secondary spermatocytes
      • Th secondary spermatocytes undergo the second half of meiosis (P2,M2,A2,T2) to form spermatids
      • The spermatids undergo differentiation to form spermatozoa
    • What are the characteristics of spermatozoa?
      Many, mini, motile
    • Adaptations of spermatozoa
      • Acrosome - contains enzymes to penetrate ovum
      • Mitochondria in middle section - provides ATP
      • Nucleus - genetic material is condensed, so less energy is required to transport it
      • Microtubules - provide whip-like movements
      • Flagellum - rotates rapidly to propel the cell
    • Is a primary spermatocyte a diploid or haploid cell?
      Diploid
    • Are the spermatogonia diploid or haploid cells?
      Diploid
    • Are the spermatids diploid or haploid cells?
      Haploid
    • What process takes the primordial germ cell into spermatogonia?
      Mitosis
    • What process takes the spermatids into spermatozoa?
      Differentiation
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