At its most extreme, "'reciprocal sign epistasis "'occurs when two deleterious genes are beneficial when together.
22.
Dominance differs from epistasis, a relationship in which an allele of one gene affects the expression of another allele at a different gene.
23.
High epistasis is usually considered a constraining factor on evolution, and improvements in a highly epistatic trait are considered to have lower evolvability.
24.
The field also includes studies of intragenomic phenomena such as heterosis, epistasis, pleiotropy and other interactions between loci and alleles within the genome.
25.
Epistasis means that the phenotypic and / or fitness effect of an allele at one locus depends on which alleles are present at other loci.
26.
In the context of development the difference between pleiotropy and epistasis is not so clear but at the genetic level the distinction is more clear.
27.
Is this an example of epistasis, where the shape of the mouths is one gene, and the expression of color is the other?
28.
Morgan and his students eventually elucidated many basic principles of heredity, including sex-linked inheritance, epistasis, multiple alleles, and gene mapping.
29.
Negative epistasis between beneficial mutations causes smaller than expected fitness improvements, whereas negative epistasis between deleterious mutations causes greater-than-additive fitness drops.
30.
Negative epistasis between beneficial mutations causes smaller than expected fitness improvements, whereas negative epistasis between deleterious mutations causes greater-than-additive fitness drops.
