When researchers say that the heritability of intelligence is 50%,they mean that
A) about half of a person's intelligence is due to genetic factors.
B) genetics and environment are equally important in determining intelligence.
C) 50% of the variation in a population's IQ scores is due to genetics.
D) half of the population lies within the normal range for intelligence.

Question

Quizplus · Accepted Answer

Heritability refers to the proportion of variation in a trait (such as intelligence) within a population that can be attributed to genetic differences among individuals. Thus, when researchers say the heritability of intelligence is 50%, they mean that 50% of the variation in intelligence across the population is due to genetic factors.

When Researchers Say That the Heritability of Intelligence Is 50%,they