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10 Cards in this Set
- Front
- Back
Meiosis
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sexual reproduction requires fertilization
meiosis 1- phophase 1,metaphase 1, anaphase 1, telophase & cytokinises meiosis 2- prophase 1, metaphase, anaphase 1, telophase & cytokinesis. |
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Prophase 1
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chromosomes form and each chromosomes pairs with its homologous chromosome, called a terad.
In a tetrad, homologous |
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Metaphase 1
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Tetrads line up in the middle, equatorial plane, of the cell
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Anaphase 1
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Homologous chromosomes separate and move away from each other to opposite poles of the cell
Each is genetically different from the original cell due to crossing |
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telophase & cytokineisis 1
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Nuclear envelope forms
Cytokinesis occurs resulting in two daughter cells Daughter cells are not identical due to crossing-over in prophase I |
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Meiosis 2
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Sister “recombinant” chromatids are separated into four gamete cells
Follows stages similar to Mitosis |
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Prophase 2
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Chromosomes form
Nuclear envelope disappears |
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Metaphase 2
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Chromosomes line up in the middle of the cell at the equatorial plate
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Anaphase 2
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Sister chromatids separate and move away from each other to opposite poles of the cell
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Telophase & cytokinesis 2
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Nuclear envelope forms
Cytokinesis occurs resulting in four genetically different gametes |