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Animations 4.1
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1 AA : 2 Aa : 1 aa complete dom/rec dom dom rec incomplete dominance dom blend dom-rec rec codominant dom1 dom1+ dom2 dom2 recessive lethal (dom. marker) dead dom rec 1 gene with 2 alleles we’ve seen 4 cases:
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I A & I B are co-dominant; i is recessive 1 Gene with 3 alleles IC. Genes with multiple alleles
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Hierarchy of dominance: C > c ch > c h > c IC. Genes with multiple alleles
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chinchilla c ch
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IC. Genes with multiple alleles chinchilla c ch
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IC. Genes with multiple alleles chinchilla c ch himalayan c h
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Hierarchy of dominance: C > c ch > c h > c IC. Genes with multiple alleles
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A short list of the 1587 known mutant alleles of the Drosophila melanogaster eye color gene w (white) IC. Genes with multiple alleles
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Back to 2 genes TIME ID. Two genes, interacting
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A/A ; B/Ba/a ; b/b A/a ; B/b self-cross A/_ ; B/_ A/_ ; b/b a/a ; B/_ a/a ; b/b
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wwm+ & m
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Coat color: Genes A, B, C, D, E, S
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A
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AYAY
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B
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C cc
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C
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C
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D
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E
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E
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II. Mention epistasis versus suppression
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S
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III. Genotype -> Phenotype... but with interactions of unknown other genes, environment, +...
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Lack of Penetrance Variable Expressivity Lack of Penetrance
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