Genetics Exam 1

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Last updated 2:23 AM on 9/6/26
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8 Terms

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allele

alternate form of a gene

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incomplete/partial dominance

expressing a blended phenotype compared to the parents

<p>expressing a blended phenotype compared to the parents</p>
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codominance

joint expression of both phenotypes without blending

<p>joint expression of both phenotypes without blending</p>
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epistasis

an allele at one locus overrides the expression of an allele at another locus

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penetrance

the percentage of individuals with a specific genotype who actually express the corresponding phenotype

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expressivity

the degree, severity, or range of expression of a phenotypic trait among individuals carrying the gene

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pleiotropy

a single gene affects multiple seemingly unrelated phenotypic traits

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test cross

crossing an individual displaying a dominant phenotype with a homozygous recessive tester to reveal if it was homo or hetero