Meioses

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  • Created by: sof98
  • Created on: 25-02-15 09:27
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  • Meioses
    • In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes as the original parent cell.
    • The two meiotic divisions are known as meiosis I andmeiosis II.
      • In meiosis 1, homologous chromosomes  pair with each other and can exchange genetic material in a process called chromosomal crossover.
      • Meiosis II is the second part of the meiotic process, also known as equational division. Mechanically, the process is similar to mitosis, though its genetic results are different.
        • The four main steps of Meiosis II are: Prophase II, Metaphase II, Anaphase II, and Telophase II.
    • Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sisters chromatids attached to a centromere

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