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Published byArthur Brezinski Modified over 5 years ago
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Terms Homologous –describes the matching chromosome from each parent (one male / one female) Diploid – term used to describe a cell that contains both sets of homologous chromosomes – 2N Haploid – term used to describe a cell that contains only a single set of chromosomes – N
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Terms Gamete – specialized cell involved in sexual reproduction - sperm or egg haploid Tetrad – structure containing 4 chromatids
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Meiosis process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell process by which gametes are formed 1 cell becomes 4 gametes 2 phases: I and II
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Prophase I each chromosome pairs with its corresponding homologous chromosome to form a tetrad Crossing over occurs where parts of homologous chromosomes are exchanged
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Metaphase I Spindle fibers attach Chromosomes line up in the middle
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Anaphase I fibers pull homologous chromosomes towards opposite ends of cell
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Telophase I and Cytokinesis
Nucleus forms and cells divide into 2 cells
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Meiosis II results in 4 haploid daughter cells N (chromosome number)
Sperm or eggs
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Prophase II No interphase between telophase I /cytokinesis and prophase II All about getting N chromosomes in the gametes, so no replication of DNA
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Metaphase II
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Anaphase II
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Telophase II / Cytokinesis
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