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Multiple Alleles, Multiple Genes, and Lethality

Delve into the fascinating world of multiple alleles, multiple genes, and lethality in genetics. Explore examples like ABO blood groups in humans, coat color in rabbits, and the story of the cheetah. Discover how traits like comb shape in chickens and flower color in peas showcase the impact of multiple genes. Learn about lethal traits like those seen in "Creeper" chickens. Unravel the complexities of genetic polymorphism versus monomorphism and the significance of the Major Histocompatibility Complex (HLA) in humans.

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Multiple Alleles, Multiple Genes, and Lethality

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  1. Multiple Alleles, Multiple Genes, and Lethality • Multiple Alleles • Multiple Genes • Lethality

  2. 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

  3. B. Multiple Genes • Example: • Comb shape in chickens • Purple flower color in peas (an example of epistasis)

  4. C. Lethality • Example: • “Creeper” chickens

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