Non-Mendelian Genetics

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What is Non-Mendelian Genetics?

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Non-Mendelian Genetics refers to patterns of inheritance that do not follow Mendel's laws of inheritance, including codominance, incomplete dominance, multiple alleles, and polygenic traits.

Front

What are codominant traits?

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Codominant traits are traits that are expressed equally in the phenotype when both alleles are present, such as AB blood type.

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What are incompletely dominant traits?

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Incompletely dominant traits are traits where the phenotype is a blend of the two alleles, such as a red flower crossed with a white flower producing pink flowers.

Front

How many alleles are involved in codominance and incomplete dominance?

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Two alleles are involved.

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What is an example of codominance in animals?

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An example of codominance is in cattle, where both red and white hairs appear together.

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What is polygenic inheritance?

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Polygenic inheritance is when multiple genes influence a single trait, such as height or skin color.

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What is the significance of multiple alleles?

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Multiple alleles refer to the presence of more than two allele forms for a gene, such as the ABO blood group system.

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What blood types can result from a cross between I^AI^B and I^Ai?

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The possible blood types are A, B, and AB, but not O.

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What is the phenotype of a person with genotype I^AI^B?

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The phenotype is AB blood type.

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What is the phenotype of a person with genotype ii?

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The phenotype is O blood type.