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 concepts like codominance, incomplete dominance, and polygenic traits.

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What is codominance?

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Codominance is a form of inheritance 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 genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype that is a blend of the two.

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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 continuous range of phenotypes, such as height or skin color.

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What is a carrier in genetics?

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A carrier is an individual who has one copy of a recessive allele that does not manifest in the phenotype but can be passed on to offspring.

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What is the genotype for a female carrier of hemophilia?

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X^H X^h (where X^H is the normal allele and X^h is the hemophilia allele).

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What is the phenotype of a roan-colored cattle?

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The phenotype of roan-colored cattle is represented by the genotype RW, where R is red and W is white.

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What is the expected percentage of female offspring that are carriers for a recessive disease if one parent is a carrier?

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50%.

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What is the difference between dominant and recessive alleles?

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Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.

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What is an example of a trait that exhibits codominance?

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An example of codominance is the AB blood type in humans, where both A and B alleles are expressed.