13. Mendelian Genetics

Epistasis

Pleiotropy and Epistasis

Incomplete Dominance, Codominance, Polygenic Traits, and Epistasis!

An allele that changes the genotype of another allele.

A gene that changes the genotype of another gene.

A gene that controls or masks the expression of another gene.

A gene that changes the genotype of the organism.

<p>Which of the following statements best describes epistasis?</p>

Pose a hypothesis to explain why the evolution of the wing was such an important event in the evolution of insects.

Epigenetic changes involving methylation can directly affect the phenotype of an individual or her offspring by                   .
a. causing correlations between parents and children;
b. causing changes to the DNA that affect gene expression but not DNA sequence;
c. generating low heritability;
d. increasing the likelihood of monozygotic twinning;
e. sterilizing the DNA

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