Nonmendelian Genetics

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What is Nonmendelian Genetics?

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Nonmendelian 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 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 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 are polygenic traits?

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Polygenic traits are traits that are controlled by two or more genes, leading to a continuous range of phenotypes, such as height and skin color.

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What is a genotype?

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A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

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What is a phenotype?

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A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

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What does homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene, either dominant (AA) or recessive (aa).

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene (Aa).

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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 within a population, allowing for a variety of phenotypes.

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What is the difference between dominant and recessive alleles?

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A dominant allele is one that expresses its trait even in the presence of a recessive allele, while a recessive allele only expresses its trait when two copies are present.