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 multiple alleles.

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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 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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Define homozygous. Give an example.

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Homozygous refers to having two identical alleles for a particular gene. Example: AA or aa.

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Define heterozygous. Give an example.

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Heterozygous refers to having two different alleles for a particular gene. Example: Aa.

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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 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 the significance of the Punnett square in genetics?

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A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

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What is the expected phenotypic ratio of a monohybrid cross?

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The expected phenotypic ratio of a monohybrid cross is typically 3:1 for dominant to recessive traits.

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What factors can influence an individual's traits?

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An individual's traits can be influenced by both genetic factors (genes) and environmental factors (such as nutrition, climate, and lifestyle).