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 other relatives, such as fraternal twins and siblings, to compare genetic similarities and differences.

Only Data from Identical Twins Are Used to Produce Heritability