Question

What is the difference between dominance and epistasis?

Answer 1

Dominance:

In heredity, dominance is more influenced by a pair of genes that affect the same hereditary character.

Epistasis:

Epistasis is a form of non-Mendelian inheritance in which one gene is capable of interfering with the expression of another.

Dominance	Epistasis
1. Dominance refers to the phenomenon of heredity in which a person has two allelic forms of a particular gene, one expressed to exclude the other.	1. Epistasis refers to an event where the expression of a gene affects the inheritance of one or more independently inherited genes.
2. This is a type of interaction between alleles of different genes in which the dominant gene gets expressed and the recessive gene remains hidden.	2. This type of interaction occurs between alleles of the same gene. At the genotypic level, the genes engaged in a particular epistatic interaction may still exhibit independent assortment.
3. Absolute dominance, imperfect dominance, and co-dominance are the three types.	3. There are six types of dominant epistasis, dominant obstructive epistasis, duplicate dominant epistasis, duplicate recessive epistasis, polymeric gene interaction, and recessive epistasis.
4. Example: Mendelian heritage of pea flower colour	4. Example: Young Labrador recovery coat color.