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Which of the following is NOT an example of a pleiotropic trait?
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3. Extensions to Mendelian Inheritance
Pleiotropy
Multiple Choice
An allele that has more than one effect on phenotype is called:
A
pleiotropic
B
codominant
C
polygenic
D
epistatic
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Understand the definition of each term related to genetic effects on phenotype:
Pleiotropic refers to a single allele influencing multiple, seemingly unrelated phenotypic traits.
Codominant describes a situation where two different alleles at a locus are both fully expressed in the heterozygote.
Polygenic refers to a trait controlled by multiple genes, each contributing to the phenotype.
Epistatic describes an interaction where one gene masks or modifies the effect of another gene at a different locus.
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