Homework Answers
Epistasis is a phenomenon in genetics in which the effect of a gene mutation id depending on the presence or absence of mutation in one or more other genes, respectively termed modifier genes.
Additive alleles are the result of polygenic traits, which means that several genes encode for the trait, resulting in more than two alleles contributing to the phenotype.
Nonadditive allels - doesnt contribute quantiatively to the phenotype, involves dominance or epistasis
Threshold - polygenic (frequently multifactorial) but they are distinguished by having a small number of phenotypic classes
In discontinuous variation, a character is found in a population in two or more distinct and separate forms called phenotypes.
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