Which statement must be true if twins are concordant for the trait of blue eyes?
A) Both of them have blue eyes.
B) Only one of them has blue eyes.
C) Both of them have had eyes of another color for their entire lives.
D) At least one of them experienced a change in eye color.

Question

Quizplus · Accepted Answer

Concordant twins have the same trait, so if they are concordant for blue eyes, both of them must have blue eyes.

Which Statement Must Be True If Twins Are Concordant for the Trait