Occuring only in one member of a twin pair
A pair of units giving different values on a variable, usually in reference to binary variables in a matched-pair design.
The situation where both members of a pair of twins do not exhibit the same characteristics. Opposite to concordant.
Twins are said to be discordant with respect to trait if one shows the trait and the other does not.
Members of a pair showing different, instead of similar, characteristics.
Differing phenotypic features between individuals, classically used in twin pairs.