08_ChromTheory - The Chromosome Theory of Inheritance! Di...

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The Chromosome Theory of Inheritance Di Stilio- Lecture 8- 4/8/11
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The Eukaryotic Chromosome Duplicated and condensed (metaphase) eukaryotic chromosome. (1) Chromatid - one of the two identical parts of the chromosome after S phase. (2) Centromere - the point where the two chromatids touch, and where the microtubules attach.
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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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Mendel’s Principle of Segregation The two alleles of a gene segregate (separate) to different gametes during meiosis; each gamete contains one allele of each gene.
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Rr parent Dominant allele for seed shape Recessive allele for seed shape Chromosomes replicate Meiosis I Alleles segregate Meiosis II Gametes PRINCIPLE OF SEGREGATION: Each gamete carries only one allele for seed shape, because the alleles have segregated during meiosis 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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This note was uploaded on 11/02/2011 for the course BIOL 11102 taught by Professor Parks,john during the Spring '11 term at University of Washington.

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08_ChromTheory - The Chromosome Theory of Inheritance! Di...

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