Multiple Alleles and Incomplete Dominance – Beyond Gregor Mendel
About the Lecture
The lecture Multiple Alleles and Incomplete Dominance – Beyond Gregor Mendel by Georgina Cornwall, PhD is from the course Understanding Genetics.
Included Quiz Questions
Which of the following is NOT true about blood typing in humans?
- Blood type is influenced by environmental factors; thus, an individual can exhibit multiple blood groups during their lifetime.
- Three alleles IA, IB, and I control the blood types in humans.
- Both IA and IB alleles are dominant over the I allele.
- Alleles IA and IB exhibit codominance when each allele is inherited by an individual.
- Type A and type B blood groups will have "A" and "B" antigens on the cell membrane of RBCs, respectively.
Which of the following statements are TRUE of the Principle of Incomplete Dominance? Select all that apply.
- Heterozygotes express both alleles.
- The phenotype of heterozygotes will be intermediate to those of their homozygotic parents.
- The phenotype of heterozygotic individuals will resemble their recessive parent.
- The phenotype of heterozygotic individuals will resemble their dominant parent.
- The male parent has a greater influence on the progeny than the female parent.
A pink snapdragon displays incomplete dominance when a red and white snapdragon cross. What is the phenotypic ratio of progeny when the pink snapdragon self-pollinates?
- 1 Red : 2 Pink : 1 White
- 2 Red : 1 Pink : 1 White
- 1 Red : 1 Pink : 2 White
- 3 Red : 1 White
- 3 Pink : 1 White
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Author of lecture Multiple Alleles and Incomplete Dominance – Beyond Gregor Mendel
Georgina Cornwall, PhD
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