07_ChromTheory - Mendel's Principle of Segregation The two...

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Mendel’s Principle of Segregation The two alleles of a gene segregate to different gametes during meiosis; each gamete contains one allele of each gene.
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Principle of Segregation
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Principle of independent Assortment During gamete formation, the segregation of each pair of alleles must occur independently.
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Principle of independent assortment
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Chromosome Theory of Inheritance Mendel's rules of inheritance can be explained by independent alignment and separation of homologous chromosomes at meiosis I.
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Beyond Mendel’s principles • Mendel worked on 7 monogenic traits in peas. • What is the haploid chromosome number in peas?
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Beyond Mendel’s principles What do we call this type of cross? What do we expect in the F 2 generation? P F 1 X PPLL ppll PpLl
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P p L l Meiosis I Meiosis I Alleles for flower color Alleles for pollen shape P p l L Meiosis II Meiosis II 1/4 PL 1/4 pl 1/4 Pl 1/4 pL Gametes Principle of independent assortment of loci
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F 2 phenotypes: 9/16 _____ ______, 3/16 ______ ______ 3/16 ____ _____, 1/16 ______ _______ PL Pl pL pl PL Pl pL pl
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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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07_ChromTheory - Mendel's Principle of Segregation The two...

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