Biology - Meiosis
If gametes  were produced in the same way as daughter cells in mitosis,
there would be a doubling of the chromosome  number at fertilisation.
The process of meiosis ensures that, normally, the gametes have only half
the number of chromosomes, that is one of each homologous  pair in each
gamete (the haploid  number). Meiosis is therefore a reduction division.
During meiosis the homologous chromosomes of diploid  cells separate. In
humans, somatic cells  contain 46 chromosomes (the diploid number) but
sperm and ova contain 23 chromosomes (the haploid  number).
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