Biology-Meoisis

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Diploid

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a cell that contains both sets of homologous chromosomes

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homologous

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each of the 4 chromosomes from the male parent has a corresponding chromosome from the female parent

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Haploid

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one let of genes

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Meiosis

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a process of reduction division in which the number of chromoseomes per cell is cut in half through the spearation of homologous chromosomes in a diploid cell

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Interphase I

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cells undergo a round of DNA replication froming duplicate chromosomes

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Phrophase I

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each chromosome pairs with its corresponding homolgous chromosome to form a tetrad

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Tetrad

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structure containing four chromatids

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Metaphase I

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spindle fibers attach to the chromosomes

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Anaphase I

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the fibers pull homologous chromosomes toward opposite ends of the cell

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Telophase I and Cytokinesis

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Nuclear membranes form, The cell separates into two cells

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Prophase II

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Meiosis I results intwo haplid daughter cells, each with half the number of chromosomes as the original cell

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Metaphase II

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The chromosomes line up in a similar way to metaphase in mitosis

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Anaphase II

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the sister chromatids separate and move toward opposite ends of the cell

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Telophase II and Cytokinesis

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Meiosis II results in four haploid (N) daughet cells

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Croosing-Over

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chromosones exchanging portions of their chromatids and produces new combinations of alleles

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Polar Bodies

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the remaing three cells that are produced but dont turn into eggs

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Difference Between Meiosis and Mitosis

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Mitosis results in the production fo two genetically identical diploid cells, whereas meiosis produces four genetically different haploid cells