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 incomplete dominance, co-dominance, and multiple alleles.

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What is Incomplete Dominance?

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Incomplete Dominance is a form of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

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Example of Incomplete Dominance?

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In snapdragon flowers, crossing a red flower (RR) with a white flower (WW) produces pink flowers (RW).

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What is Co-Dominance?

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Co-Dominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.

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Example of Co-Dominance?

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In cattle, a red coat (RR) and a white coat (WW) can produce a roan coat (RW) that shows both red and white hairs.

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What are Multiple Alleles?

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Multiple Alleles refer to the presence of more than two alleles for a genetic trait within a population.

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Example of Multiple Alleles?

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The ABO blood group system in humans is determined by three alleles: I^A, I^B, and i.

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What is the genotype for blood type A?

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The genotype for blood type A can be I^A I^A (homozygous) or I^A i (heterozygous).

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What is the genotype for blood type B?

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The genotype for blood type B can be I^B I^B (homozygous) or I^B i (heterozygous).

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What is the genotype for blood type AB?

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The genotype for blood type AB is I^A I^B.