What is the narrow sense heritability equation and how is it used to quantify the genetic contribution to a specific trait in a population?

The narrow sense heritability equation is a statistical formula used to estimate the proportion of variation in a trait that is due to genetic factors. It is calculated by dividing the additive genetic variance by the total phenotypic variance. This equation helps quantify the genetic contribution to a specific trait in a population by providing a numerical value that represents the extent to which genetic factors influence the trait compared to environmental factors.