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MCBL - Meiosis

Meiosis I & II

QuestionAnswer
Meiosis I Product: reduced number of homologous chromosome pairs into 2 different cells (Haploid)
Meiosis II Product: four new Haploid cells
Prophase I homologous chromosomes become physically attached (tetrad) (bivalent)
Metaphase I line up as homologous pairs as tetrads along the metaphase plate
Anaphase I we separate homologous chromosomes, Sister chromatids are still attached @ centromere
Telophase I/ Cytokinesis homologous chromosomes are now at opposite sides of the poles and the cleavage furrow begins to occur
Prophase DNA begins to condense (chromatin) and the nucleoli disappear; microtubules are organized/centrosomes move to opposite sides/poles of the cell.
Prometaphase the nucleus disintegrates, add kinetochores on the centromere of each sister chromatid
Metaphase all sister chromatids align along the metaphase plate and are attached to the mitotic spindle (fully formed) at the kinetochores
Anaphase begin to separate sister chromatids. The microtubules shorten and pull to opposite sides (chromatids)
Telophase/Cytokensis chromosomes are now at opposite sides of the cell; nucleus begins to reform; DNA decondenses. Cleavage furrow begins. FOR PLANTS (CELL PLATE)
Created by: aduchini
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