Cell-Structure-And-Functioncell-Cycle-And-Cell-Division-2
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Meiosis involves two sequential cycles of nuclear and cell division called meiosis I and meiosis II but only a single cycle of DNA replication.
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Meiosis I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase.
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Recombination between non-sister chromatids of homologous chromosomes leads to variations and finally evolution of a new species.
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Two haploid cells are formed after meiosis I and four haploid cells are formed at the end of meiosis II.
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Due to meiosis specific chromosome number of each species is maintained across generations.
