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, codominance, and polygenic traits.

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What is the definition of codominance?

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Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

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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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What are polygenic traits?

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Polygenic traits are characteristics that are influenced by multiple genes, leading to a range of phenotypes, such as height and 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 alleles for a genetic trait, allowing for a greater variety of phenotypes.

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How do you determine the possible blood types of parents if a child has blood type AB?

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If a child has blood type AB, the parents must have at least one A allele and one B allele, making the possible parental blood types A and B.

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What is the phenotype of a heterozygous individual for an incompletely dominant trait?

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The phenotype of a heterozygous individual for an incompletely dominant trait is a blend of the two homozygous phenotypes.

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How many alleles are involved in codominant and incompletely dominant traits?

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Two alleles are involved in codominant and incompletely dominant traits.

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What is an example of a trait that exhibits incomplete dominance?

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An example of a trait that exhibits incomplete dominance is flower color in snapdragons, where red and white flowers produce pink offspring.

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What is the difference between complete dominance and incomplete dominance?

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In complete dominance, the dominant allele completely masks the effect of the recessive allele, while in incomplete dominance, the heterozygous phenotype is a mix of both alleles.