Meiosis I

What is unique about the first round of Meiosis? The first cell division in Meiosis is known as Meiosis I. The function of Meiosis I is very different from that of either Mitosis or Meiosis II. In both Mitosis and Meiosis II sister chromatids are separated during anaphase to produce identical daughter cells. In Meiosis I members of homologous chromosome pairs are separated. This results in the segregation of genes into the two gametes. The principle of segregation is one of two core ideas in genetics proposed by Gregor Mendel. The segregation of any one pair of chromosomes is independent of any other pair. Assortment of chromosomes from each pair to the two daughter cells is random. The number of possible genetic combinations in the resulting gametes is therefore very large.

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