Sexual Reproduction

Mindmap produced from sexual reproduction markscheme - key words and terms

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  • Created by: Sara
  • Created on: 11-04-13 17:01
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  • Sexual Reproduction
    • Spermatogenesis
      • In testes, seminiferous tubules
      • Puberty - death
      • 4 gametes per germ cell
      • Fully differentiates, mature sperm produced
      • Large numbers
      • Sertoli cells
        • Provides nutrients and protection - ATP synthesis
    • Oogenesis
      • Ovary
      • Before birth - menopause (monthly)
      • 1 gamete per germ cell - 3 polar bodies
      • Secondary oocyte produced - division completed at fertilisation
      • Follicle cells involved
    • Pregnancy testing
      • Urine sample added
      • If hCG is present, attaches to monoclonal antibodies
        • MC antibodies and hCG bind with immobilised enzymes - colour
      • Uncombined MC antibodies travel and bind with 2nd immobilised enzymes - colour
      • hCG specific
        • hCG maintains corpus luteum
    • Meiosis
      • Crossing over
        • Genetic variation
        • Offspring genetically varied
      • Random assortment
        • Random alignment
        • any allele can be inherited with any other pari
        • different homologous pai
        • Fertilisation random process
    • Sperm Journey
      • Enter epididymis
      • Enter vas deferens
      • Enter urethra
      • Enter vagina
      • Enter cervix
      • Enter uterus
    • Fertilisation
      • Diploid number restored
      • Acrosome of sperm contains hydrolytic enzyme, which digests zona pellucida
      • Egg cell completes meiosis II
      • Sperm- Mitochondria to produce ATP for swimming
      • Hard layer forms around egg cell to prevent more sperm from fusing

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