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Multiple Allele Traits

Multiple Allele Traits. Some traits are determined by more than two different alleles. Some traits have multiple alleles, but an individual will only inherit two of the alleles . Examples include hair color in rabbits and blood types in humans.

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Multiple Allele Traits

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  1. Multiple Allele Traits Some traits are determined by more than two different alleles. Some traits have multiple alleles, but an individual will only inherit two of the alleles. Examples include hair color in rabbits and blood types in humans.

  2. Trait = Blood Type Alleles = IA, IB, i Phenotypes Type A Type B Type AB Type O Genotypes IAIA or IAi

  3. Trait = Blood Type Alleles = IA, IB, i Phenotypes Type A Type B Type AB Type O Genotypes IAIA or IAi IBIBor IBi

  4. Trait = Blood Type Alleles = IA, IB, i Phenotypes Type A Type B Type AB Type O Genotypes IAIA or IAi IBIB or IBi IA IB(co-dominance)

  5. Trait = Blood Type Alleles = IA, IB, i Phenotypes Type A Type B Type AB Type O Genotypes IAIA or IAi IBIB or IBi IA IB(co-dominance) ii

  6. Homozygous A = IAIA Heterozygous A = IAi Homozygous B = IBIB Heterozygous B = IBi IAIB ii

  7. Sample Problem #1 Mom = Homozygous for A type. Dad = Heterozygous for B type. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____%

  8. Sample Problem #1 (ANSWER) Mom = Homozygous for A type. Dad = Heterozygous for B type. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____% IAIA IBi IAIA IB i

  9. Sample Problem #1 (ANSWER) Mom = Homozygous for A type. Dad = Heterozygous for B type. X Type A = 2/4 =____% Type B = ____% Type AB = 2/4 =____% Type O = ____% IAIA IBi 50 IAIA 0 IB i IA IB IA IB 50 IAi IAi 0

  10. Sample Problem #2 2. Mom = Type O. Dad = Type AB. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____%

  11. Sample Problem #2 (ANSWER) 2. Mom = Type O. Dad = Type AB. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____% ii IA IB 50 IA IB 50 i i IAi IBi 0 0 IAi IBi

  12. Sample Problem #3 3. Mom = Type AB. Dad = Type AB. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____%

  13. Sample Problem #3 (ANSWER) 3. Mom = Type AB. Dad = Type AB. X Type A = ____% Type B = ____% Type AB = ____% Type O = ____% IA IB IA IB 25 IA IB 25 IA IB IAIA IA IB 50 IA IB IB IB 0

  14. 4. If a woman with type A blood has a baby with type AB, could a man with O type blood be the father? 5. What could be the possible genotypes of the father in #4? No, because the child would have inherited the “B” allele from the dad and man with O-type blood has a genotype of “ii”. Since the child inherited the “A” allele from mom, the “B” would have to come from dad. So, any gentoype with the dominant “B” allele is possible. IBIB IBi IAIB

  15. 6. A child with O type blood could have parents with all types of blood EXCEPT _________. 7. Which blood type is known as the universal donor? 8. Which blood type is know at the universal recipient? IAIB Type O Type AB

  16. 9. A person with A type blood can receive which blood types? Type A & O

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