If fraternal twins are more likely to be concordant for a trait than other siblings, can it be concluded that the higher concordance rate is due to the greater degree of genetic relatedness?
A) Yes.
B) Yes, but only if the siblings studied are of the same sex and age.
C) No, because fraternal twins are no more genetically alike than other siblings.
D) No, because the greater similarity can be attributed to environmental influence.

Question

Quizplus · Accepted Answer

Fraternal twins share the same genetic relatedness as other siblings, so a higher concordance rate cannot be attributed to genetics alone.

If Fraternal Twins Are More Likely to Be Concordant for a Trait