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Updated: Jul 12, 2026

Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila
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Epistasis and dominance: evidence for differential effects in life-history versus morphological traits

Derek A Roff1, Kevin Emerson

  • 1Department of Biology, University of California, Riverside, California 92521, USA. Derek.roff@ucr.edu

Evolution; International Journal of Organic Evolution
|December 1, 2006
PubMed

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Epistasis01:39

Epistasis

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Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
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The Evidence for Evolution

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Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Background and Environment Affect Phenotype

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Epistasis Analysis

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