Term
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Definition
-the cell replicates its chromosomes
-each chromosome has two sister chromatids held together by a centromere |
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Term
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Definition
-chromosomes coil up and a spindle forms
-homologous chromosomes come together matched gene by gene forming a tetrad
-Crossing Over may occur when chromatids exchange genetic material
-this occurs two or three times per pair of homologous chromosomes
-Crossing Over results in new combinations of alleles on a chromosomes |
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Term
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Definition
the centromere of each chromosome becomes attached to a spindle fiber
-the spindle fibers pull the tetrads to the equator of the spindle
-homologous chromosomes are lined up side by side as tetrads |
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Term
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Definition
-homologous chromosomes separate and move to opposite ends of the cell
-centromeres do not split
-this ensures that each new cell will receive only one chromosome from each homologous
pair |
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Term
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Definition
-the spindle breaks down and the chromosomes uncoil
-the cytoplasm divides to yield two new cells
-each cell has half the genetic information of the original cell because it has only one homo-
logous chromosome from each pair |
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Term
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Definition
| -a spindle forms in each of the two new cells and the fibers attach to the chromosomes |
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Term
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Definition
| -the chromosomes are pulled to the center of the cell and line up randomly at the equator |
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Term
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Definition
-the centromere of each chromosome splits
-the sister chromatids separate and move to opposite poles |
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Term
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Definition
-nuclei re-form
-the spindles break down
-the cytoplasm divides
-identical to mitosis (Meiosis II) |
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Term
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Definition
-four haploid sex cells from one original diploid cell
-each haploid cell contains one chromosome from each homologous pair
-haploid cells will become gametes transmitting genes to offspring |
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