Monday, 29 June 2020

Cell Division

Cells divide for a few reasons:
  • growth
  • repair
  • asexual reproduction
  • gamete production (for sexual reproduction)
Organisms have two types of cell division to cater for these different reasons: Mitosis and Meiosis.

MITOSIS

This type of cell division creates two daughter cells that are identical clones of the parent cell (unless a mutation occurs). We do this for growth and repair. Some organisms use this to create clones (asexual reproduction).


MEIOSIS

Organisms that use sexual reproduction rely upon meiosis to make gametes (sex cells). Sex cells need to be haploid (half the number of chromosomes), so they make a cell with the right number of chromosomes during fertilisation. Variation during meiosis can be inherited, as these cells are the start of a new life.


COMPARE AND CONTRAST


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