Question

Research regarding the genetic basis of intelligence has suggested that

Select one:

a. Intelligence is determined by the five genes that influence working memory

b. Intelligence is not limited to a single genetic or environmental cause, but rather a combination of genetic and environmental factors

c. Intelligence is determined by the genes that are shared by dizygotic twins, but not monozygotic twins

d. Intelligence is determined to a significant extent by the GABA gene

e. Intelligence is purely environmental, and genetics do not influence it at all

Answer 1

Research regarding the genetic basis of intelligence has suggested that intelligence is not limited to a single genetic or environmental cause, but rather a combination of genetic and environmental factors.

Researchers have conducted many studies to focusing on similarities and differences between IQ within families, particularly looking at adopted children and twins. Only 50% of the difference in intelligence among individuals is due to genetic factors. Factors related to child's home environment, parenting, resources and nutrition all contribute to intelligence. A person's environment and genes influence each other.