Things to remember
- Additive variance: Arises of from difference between two homozygotes for a gene i.e. AA and aa. It is generally represented ‘d’
- Dominance variance or Intra allelic interaction: It is due to the deviation of heterozygote (Aa) phenotype from the average of phenotypic values of the two homozygotes (AA and aa) it is represented by ‘h’.
- Epistasis variance or Inter allelic Interaction: Results from an interaction between two or more genes represented by ‘e’.