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Exam III notes - centromeres of chromosomes nuclear...

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Difference between Mitosis and Meiosis Mitosis - produces 2 identical cells Diploid cells (full compliment of chromosomes) (e.g. 46 in humans) Meiosis - produces 4 cells, each different from one another Haploid cells (gametes or sex cells) (sperm and egg cells) (half # of chromosomes e.g. 23 in humans) Sister Chromatids - identical to one another because they are a result of DNA replication Homologous chromosomes- Contain DNA that codes for the same genes. In this example, both chromosomes have all the same genes in the same locations but different versions of the gene. Diagram in Notebook Prophase - DNA winds up into chromosomes, spindle fibers form and attach to
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Unformatted text preview: centromeres of chromosomes, nuclear membrane disappears Prophase I- Prophase + homologous chromosomes pair up Prophase II- Spindle fibers reform and attach to the chromosomes at their centromeres Metaphase- chromosomes line up at equator Anaphase- chromosomes split and move to opposite ends of the cell. Anaphase of Mitosis- sister chromatids separate Anaphase I- pairs of homologous chromosomes separate Telophase- the nuclear membrane reforms around the chromosomes, the spindle fibers disappear, finally, the cytoplasm is divided, new cell membrane forms, and the cells divide...
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