Jones_Unit7_FinalReport - Name SAMANTHA JONES Course section number 11G Unit 7 Meiosis Pipe Cleaner Activity This represents what the cell looks

Jones_Unit7_FinalReport - Name SAMANTHA JONES Course...

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Name: SAMANTHA JONES Course section number: 11G Unit 7: Meiosis Pipe Cleaner Activity This represents what the cell looks like in interphase. As in mitosis, the cell grows during G1 phase, copies all of its chromosomes during S phase, and prepares for division during G2 phase. During prophase I, differences from mitosis begin to appear. As in mitosis, the chromosomes begin to condense, but in meiosis I, they also pair up. Each chromosome carefully aligns with its homologue partner so that the two match up at corresponding positions along their full length. The events that you set up in this step are representing Prophase I, of Meiosis I. The next event that will happen in Prophase I is unique to Meiosis; it is called crossing over. First you will need to pair up one paternal and one maternal chromosome (a red X and a blue X). Lay them out so that they partially overlap one another. These structures, where the maternal and paternal versions of each chromosome link together, are called tetrads. While the tetrads exist, the matching maternal and paternal genes are lined up, side by side, and some random swapping of genetic information occurs between the chromatids. This exchange of maternal and paternal genes is the crossing over process. So, during metaphase I, homologue pairs—not individual chromosomes—line up at the metaphase plate for separation.
Name: SAMANTHA JONES Course section number: 11G Unit 7: Meiosis Pipe Cleaner Activity Next, the tetrads will be pulled apart and the pairs of homologous chromosomes (each pair of sister chromatids still held together at the centromere) will be dragged to opposite sides of the cell by the spindle apparatus. Move each pair of sister chromatids 149 as

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