Cell Division-Meiosis B5

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  • Created by: kira
  • Created on: 22-06-11 19:25

(notes taken from the CGP revision guides)

  • Gametes have half the usual number of chromosomes.
  • During sexual reproduction, an egg and a sperm combine to form a new cell, called a zygote.
  • All human body cells have two copies of the 23 chromosomes. But gametes only have one copy of each chromosome.
  • So when the egg and the sperm combine the zygote will contain 46 chromosomes - one set of 23 from each parent.
  • Gametes are produced by Meiosis.
  • Meiosis involves two divisions. It produces new cells that only have half the original number of…


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