Only data from identical twins are used to produce heritability estimates of intelligence and other characteristics, since other relatives, such as siblings, are too genetically different to produce usable data.

Question

Quizplus · Accepted Answer

Heritability estimates of intelligence and other characteristics are often derived from studies involving both identical twins and fraternal twins, as well as other relatives like siblings and parents, to compare genetic similarities and differences.

Only Data from Identical Twins Are Used to Produce Heritability