Chapter 11 — LO 7 — Non-Mendelian Inheritance and Other Factors Affecting Mendel's Predictions

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8 Terms

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What is incomplete dominance?

A heterozygote shows an intermediate phenotype between the two homozygotes.

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What is codominance?

Both alleles have distinguishable phenotypic effects in the heterozygote.

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What are multiple alleles?

More than two versions of a gene exist in a population.

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Type A and B parents have children with types A, B, AB, and O. What are the parents' genotypes?

Iᴬi and Iᴮi.

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What is polygenic inheritance?

Multiple genes contribute to a single trait.

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What is pleiotropy?

One gene influences multiple traits.

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What is epistasis?

One gene affects or masks the expression of another gene.

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How can environment change phenotype without changing genotype?

Environmental factors can alter gene expression or protein activity, such as temperature-sensitive pigment production.