If a trait is influenced by genes, then it ought to be more highly correlated across pairs of ________ than across pairs of ________.

A) genetic siblings; fraternal twins
B) fraternal twins; identical twins
C) identical twins; fraternal twins
D) adoptive siblings; genetic siblings

Highly Correlated

Describes a strong statistical relationship between two variables, indicating that changes in one variable are reliably associated with changes in another.

Genetic Siblings

Siblings who share both biological parents and have a high degree of genetic similarity.

Fraternal Twins

Twins that develop from two different eggs fertilized by two different sperm, resulting in siblings that are genetically similar but not identical.