Multiple Alleles, Multiple Genes, and Lethality

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Multiple Alleles, Multiple Genes, and Lethality

• Multiple Alleles
• Multiple Genes
• Lethality

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A. Multiple Alleles

• Examples
• ABO blood groups in humans
• Coat color in rabbits
• Genetic polymorphism vs. genetic monomorphism
• Major histocompatibility complex (HLA in humans)
• Story of the cheetah

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B. Multiple Genes

• Example
• Comb shape in chickens
• Purple flower color in peas (an example of
  epistasis)

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C. Lethality

• Example
• Creeper chickens