Twins that share a particular trait are said to be for the trait.

Concordant

Explanation:

The term concordant have raised from Concordance.

Concordance: The term is usually used in genetics in the twin's study.

It refers to the presence of a similar trait in both units or members of a given pair of twins. In other words, the concordance reflects the probability of the presence of definite characteristics in a pair of individual i.e the twins.

Hence, both the person will share similar attributes, and the percentage of concordance in each pair of twins is 50%.

Example: The research that aims at finding the relation between the environment and genes or heredity, always take twins for consideration.

the right answer is a

answer; cultural trait;