Summary for Midterm I

Summary for Midterm I - Genes - Principle of dominance...

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Genes --- Principle of dominance Principle of segregation Principle of independent assortment Alleles --- different forms of genes complete dominance phenotype of TT = Tt incomplete dominance phenotype of TT = Tt = tt codominance phenotype of Tt = TT + tt (ABO blood type MN)
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Chromosome segregation during cell division mitosis 2n => 2n 1 cell => 2 cells meiosis 2n => 1n 1 cell => 4 cells homologous chromosome pairing recombination Genes --- Principle of dominance Principle of segregation Principle of independent assortment
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Fig 2.6 Mitosis in animal cells. Mitosis
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No DNA synthesis Meiosis
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Genes --- Principle of dominance Principle of segregation Principle of independent assortment Monohybrid cross Tt X Tt Phenotype (TT + Tt) : tt = 3:1 Genotype TT : Tt : tt = 1 : 2 : 1 Dihybrid cross TtYy X TtYy Phenotype T_ Y_ : T_ yy : tt Y_ : tt yy = 9 : 3 : 3 : 1
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Gene interaction: phenotype ratio: variations of 9 : 3 : 3 : 1 same genetic pathway --- epistasis Precursor ===> intermediate product ===> Fnal product A B duplicate genetic pathway precursor 1 Fnal product precursor 2
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This note was uploaded on 04/25/2010 for the course LIFE SCIEN Genetics taught by Professor Chen during the Spring '10 term at UCLA.

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Summary for Midterm I - Genes - Principle of dominance...

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