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Pre-Bio 11-4 Meiosis Steps and Vocab UPDATED

Pre-Bio 11-4 Meiosis Steps and Vocab UPDATED

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Tags: science   biology   high school   ngss   hs-ls1-4   ls1-4   meiosis   steps  

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Interphase
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Cell Grows, DNA is Copied, Cell Gets Ready for Meiosis
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Prophase I
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Homologous chromosomes form tetrads; Crossing over occurs; Nuclear envelope breaks down.
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Metaphase I
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Tetrads (homologous chromosomes) line up in the middle of the cell; spindle attaches to centromere.
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Anaphase I
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Homologous chromosomes are pulled apart.
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Telophase I
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Two new nuclear envelopes reform.
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Cytokinesis
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This step occurs after both Telophase I and Telophase II. It is where the original cell finally separates into two new cells.
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Prophase II
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Occurs after cytokinesis I; the two nuclear envelopes break down.
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Meiosis II
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Chromosomes line up in the middle of the cell; spindle attaches to the centromeres.
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Anaphase II
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Sister chromatids are pulled apart.
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Telophase II
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Four new nuclear envelopes reform around the chromatids.
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Meiosis I
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Two haploid daughter cells are formed by separating homologous chromosomes.
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Meiosis II
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Four haploid gametes are formed by separating sister chromatids.
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The structure formed when chromosomes find their homologous pair.
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Tetrad
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Chromosomes that are the same size and contain corresponding genetic information.
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Homologous Chromosomes
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Sex Cells; sperm and egg
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Gametes
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Cells that contain both sets of homologous chromosomes; 2N
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Diploid
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Cells that contain one set of chromosomes; N.
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Haploid
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Type of cell division that creates genetically identical diploid cells.
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Mitosis
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Type of cell division that creates genetically different haploid cells.
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Meiosis
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Process that occurs during Prophase I in which homologous chromosomes exchange corresponding parts of their DNA.
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Crossing Over
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Process that occurs during Metaphase I in which chromsomes line-up in the middle of the cell in a random order.
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Independent Assortment
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