AGB 121: Principles of Animal Genetics and Population Genetics (2+1)

COMPONENTS OF VARIANCE

• The different components of variance are the same as the components of the phenotypic value.

• The components of values and corresponding variance

• The important difference between components of value and variance is that in case of phenotypic value, each component can have positive or negative values on the other hand phenotypic variance are always positive.
• There is usually a substantial amount of non genetic variation whose cause is unknown and which cannot be eliminated by experimental design. This is referred to as “intangible variation”.