What would a researcher need to know to estimate the heritability coefficient of a particular trait or characteristic?

Question

Quizplus · Accepted Answer

To estimate the heritability coefficient of a trait, a researcher needs to understand both the genetic and environmental influences on that trait. Comparing the correlation between monozygotic (identical) twins reared together, who share both genes and environment, with the correlation between dizygotic (fraternal) twins reared together, who share only half their genes but the same environment, allows for the estimation of the extent to which genetic factors contribute to the variation in the trait.

What Would a Researcher Need to Know to Estimate the Heritability