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4.4-4.5 Multiple Alleles, Incomplete dominance and Codominance

4.4-4.5 Multiple Alleles, Incomplete dominance and Codominance. Pages 143-145. Complete dominance. One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers. Incomplete Dominance.

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4.4-4.5 Multiple Alleles, Incomplete dominance and Codominance

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  1. 4.4-4.5 Multiple Alleles, Incomplete dominance and Codominance Pages 143-145

  2. Complete dominance • One allele is dominant over the other • PP purple flowers • Pp purple flowers • pp white flowers

  3. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual. Incomplete dominance results in partial expression of both traits.

  4. Incomplete dominance in impatiens photo from: kids.britannica.com

  5. Incomplete Dominance in Animals Rex rabbit (short fur)crossed with angora rabbit (long fur) Photo from: buzzle.com

  6. Punnett Square Image by: fhs-bio-wiki.pbworks.com

  7. Codominance Occurs when both alleles are expressed fully to produce offspring with a third phenotype. (Polka dot)

  8. Codominance in short horn cattle home.comcast.net hobart.k12.in.us

  9. Blood types There are 3 alleles for bloodtype: IA , IB , i

  10. Blood medterms.com

  11. Alleles • Each allele codes for a different enzyme that places different types of sugars on the surface of a red blood cell.

  12. There are three possible alleles for blood type • i • IA • IB

  13. There are four types of blood Type A Type B Type AB Type O

  14. Genotypes and Phenotypes IAIAblood type A IBIBblood type B IA IB blood type AB IAi blood type A IBiblood type B ii blood type O

  15. Antigens Type A blood has anti-B antigens. If a person with A-type blood receives B-type blood or AB-type blood, it will clot.

  16. Blood types learn.genetics.utah.edu

  17. Blood type O The universal donor because people with every blood type can receive O-type blood without a danger of it clotting.

  18. Blood Type AB The universal recipient because people with AB blood can receive any type of blood

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