06_Mendel II - The Consequences of Meiosis Hypothetical...

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Hypothetical example Eye color Allele that contributes to brown eyes Allele that contributes to blue eyes Maternal chromosome Paternal chromosome Hair color Allele that contributes to black hair Allele that contributes to red hair Maternal chromosome Paternal chromosome The Consequences of Meiosis
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During meiosis I, tetrads can line up two different ways before the homologs separate. OR Brown eyes Black hair Blue eyes Red hair Blue eyes Black hair Brown eyes Red hair
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2. Synapsis of homologous chromosomes. Crossing over of non- sister chromatids. 3. Tetrads migrate to middle of cell. 4. Homologs separate. Tetrad Chiasma Crossing-over during Meiosis I
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2. Crossing over during meiosis I. 1. Parent cell with four chromosomes. 3. Homologs separate. (Pairing of chromosomes depends on independent assortment.) 4. Gametes produced by meiosis II. 5. Offspring produced by selfing (only some of the possibilities shown.) EVEN SELF-FERTILIZATION LEADS TO GENETICALLY VARIABLE OFFSPRING
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This note was uploaded on 05/18/2008 for the course CSE 142 taught by Professor Martystepp during the Spring '07 term at University of Washington.

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06_Mendel II - The Consequences of Meiosis Hypothetical...

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