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14 Cards in this Set
- Front
- Back
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Define Meiosis |
A process of conversion of diploid to haploid cells |
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A diploid has ___ chromosomes |
46 |
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A haploid has ___ chromosomes |
23 |
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Meiosis consists of how many sets of stages? |
Two: Meiosis I and Meiosis II |
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What happens in Interphase I? |
DNA replicates, forming duplicate chromosomes |
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What happens in Prophase I? |
Nuclear envelope disappears, centromeres appear. The duplicate chromosomes pair with the corresponding homologous chromosomes to pair a tetrad |
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Explain Metaphase I |
Homologous chromosomes line up and pair up,(each consisting of two sister chromatids) as spindle fibers attach to them |
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Explain Anaphase I |
Fibers pull the homologous chromosomes (sister chromatids) apart to opposites ends of the cells |
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Telophase I |
Nuclear membrane and envelope form, the cell separates into two new cells as haploid cells |
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Cytokenesis I |
The cytoplasm has split between the two new cells
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What happens in Prophase II and Metaphase II? |
The two cells' chromatids line up together in the middle |
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Anaphaase II? |
The sister chromatids are pulled apart as chromsomes into two new cells each |
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Cytokenesis II? |
Four cells are produced. |
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Each new cell contains a |
single chromosome from the original chromosome pair |
