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11.2 More complicated genetics

11.2 More complicated genetics. Question: Are different traits (alleles) joined somehow? Ex) does shape of seed allele affect seed color allele?. F 1 generation = all heterozygous both traits. F 2 generation.

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11.2 More complicated genetics

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  1. 11.2 More complicated genetics

  2. Question: Are different traits (alleles) joined somehow? • Ex) does shape of seed allele affect seed color allele?

  3. F1 generation = all heterozygous both traits

  4. F2 generation

  5. Mendel discovered independent assortment - genes for different traits segregate independently during gamete formation. • Traits are not “linked”

  6. 11.3 Beyond Dominance • Incomplete Dominance - heterozygous offspring is in between D and R phenotype

  7. Co-dominance - phenotypes of D and R are both clearly expressed

  8. Incomplete dominance or co-dominance?

  9. Punnett squares look the same for co- and incomplete dominance

  10. Multiple Alleles - a gene with more than two alleles (ordered most > least dominant) • Ex) human blood type

  11. Polygenic traits - some phenotypes are controlled by 2 or more different genes • Also called gene interaction • Ex) human hair, eye, skin color

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