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1/10/14 Objective: What factors influence typical inheritance

1/10/14 Objective: What factors influence typical inheritance Do Now: What are the 4 blood types that exist?. More than one allele controls a trait (ex: blood type). Multiple Alleles. Blood types: A, B, AB, or O. Allele O is recessive. Codominance.

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1/10/14 Objective: What factors influence typical inheritance

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  1. 1/10/14 Objective: What factors influence typical inheritance Do Now: What are the 4 blood types that exist?

  2. More than one allele controls a trait (ex: blood type) Multiple Alleles • Blood types: A, B, AB, or O Allele O is recessive

  3. Codominance • A heterozygote expresses BOTH traits (ex: AB = Blood type AB) Allele O is recessive

  4. Turn and Talk • What is the genotypic ratio of the offspring if you cross a man who is heterozygous for type A blood and a female who is homozygous for type O blood?

  5. When two or more genes affect a single trait (ex: skin color, eye color) Polygenic Inheritance

  6. Ex: exercise on weight, amount of sun on skin color Influence of the Environment

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