Which pair of family members is likely to have the most similar IQ scores?
A) Mother and father
B) Mother and biological child
C) Identical twins
D) Fraternal twins

Question

Quizplus · Accepted Answer

Identical twins share 100% of their genes, while mothers/fathers and biological children share only 50% of their genes. Fraternal twins share the same amount of genes as any other siblings, which is 50% on average, and may differ in their IQ scores. Therefore, identical twins are likely to have the most similar IQ scores.

Which Pair of Family Members Is Likely to Have the Most