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Meiosis

Meiosis. Early prophase I. Prophase I. Metaphase I. Anaphase I. Telophase II. Anaphase II. Metaphase II. Telophase I. Meiosis. Late telophase II. Independent assortment of chromosomes – homologous chromosomes line up on the equator independently, as a result all gametes are different.

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Meiosis

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  1. Meiosis

  2. Early prophase I Prophase I Metaphase I Anaphase I Telophase II Anaphase II Metaphase II Telophase I Meiosis Late telophase II

  3. Independent assortment of chromosomes – homologous chromosomes line up on the equator independently, as a result all gametes are different

  4. Crossing over – mixes the alleles of genes on homologous pairs of chromosomes

  5. Meiosis increases variation by… • Independently sorting one of each chromosome pair into each gamete. Gametes can therefore contain a wide variety of different combinations of alleles. • Exchanging some alleles on the same chromosome with different alleles on the homologous chromosome by crossing over. These chiasmata produce further variation in the combination of alleles in gametes. • Reduce the chromosome number in gametes enabling fertilisation to produce further mixing of alleles from parents in sexual reproduction.

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