According to research examining the relationship between genotype and environment to intellectual abilities, which of the following pairs of individuals will be MOST similar in intelligence?
A) Casey and Jordan, who are biological siblings
B) Eileen and Sarah, who are mother and daughter
C) Hugh and Connor, who are grandfather and grandson
D) Maleeka and Chantel, who are adopted siblings

Question

Quizplus · Accepted Answer

Biological siblings share approximately 50% of their genetic material, making them the most genetically similar pair of individuals on the list. Research suggests that genetic factors play a significant role in intelligence, so Casey and Jordan's shared genes make them the most likely to be similar in intellectual abilities.

According to Research Examining the Relationship Between Genotype and Environment