Non Mendelian Inheritance

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What is Non-Mendelian Inheritance?

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Non-Mendelian inheritance refers to patterns of inheritance that do not follow Mendel's laws of segregation and independent assortment. It includes incomplete dominance, codominance, multiple alleles, and polygenic inheritance.

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What is incomplete dominance?

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Incomplete dominance is a form of inheritance where the phenotype of the offspring is a blend of the parents' phenotypes. For example, crossing red and white flowers results in pink flowers.

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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. An example is AB blood type, where both A and B antigens are present.

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What is polygenic inheritance?

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Polygenic inheritance is a type of inheritance where multiple genes influence a single trait, resulting in a continuous range of phenotypes. Examples include human height and skin color.

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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. An example is the ABO blood group system, which has three alleles: I^A, I^B, and i.

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What is the phenotype of a horse that is palomino?

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The palomino phenotype is a result of incomplete dominance between a dark brown horse and a white horse, resulting in a tan color.

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What is the genotype for type O blood?

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The genotype for type O blood is ii, meaning it does not have A or B antigens.

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What is the genotype for type B blood?

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The possible genotypes for type B blood are I^BI^B and I^Bi.

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What happens when red and white snapdragons are crossed?

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When red snapdragons are crossed with white snapdragons, the offspring produce pink flowers, demonstrating incomplete dominance.

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What is the significance of antigens in blood types?

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Antigens are substances on the surface of red blood cells that determine blood type. Type O blood has no A or B antigens.