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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Crossing Over |
Pairs of chromosomes line up and exchange genetic material. |
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Independent Assortment |
The various combinations of chromosome arrangement |
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Prophase I |
Similar to Prophase in Mitosis in that the envelope breaks down and chromosomes condense etc. However we also see crossing over occur at the chiasmata to allow genetic exchange. |
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Metaphase I |
When each pair of bivalents (pair of chromosomes) allign at the equator. The position of each bivalent is random (Random assortment) - this contributes to genetic variation. |
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Anaphase I |
Homologous chromosomes seperate |
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Telophase I |
Nuclear envelope reforms around haploid nuclei containing half the number of chromosomes |
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Meiosis I |
Homologous chromosomes seperate therfore there is only one chromosome of every pair per gamete. |
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Meiosis II |
Sister chromatids seperate, composed of Prophase II Metaphase II Anaphase II and Telophase II. This is essentially another round of cell division leading to the formation of four haploid daughter cells containing single chromosomes. |
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Order of the stages |
(Interphase) Prophase I Metaphase I Anaphase I Telophase I (Cytokenisis) Prophase II Metaphase II Anaphase II Telophase II (Cytokenisis) |
Interphase only occurs once |
