Answer: False
Explanation:
If concordance rates were higher for dizygotic (DZ) twins compared to monozygotic (MZ) twins, it would suggest a larger role of environmental factors in the trait rather than genetics. This is because DZ twins share about 50% of their genes, just like any siblings, while MZ twins share 100% of their genes. If the concordance rates are higher in DZ twins, it implies that the shared genetic makeup of MZ twins is not the primary factor influencing the trait. Instead, environmental factors would be considered more influential in the observed trait or illness.
True. In twin studies, concordance refers to whether both members (or neither members) of a pair of twins had a particular trait or illness. If the concordance rates are higher for pairs of dizygotic (fraternal) twins compared to pairs of monozygotic (identical) twins, it suggests that the trait is more influenced by genes than by the environment. This is because dizygotic twins share approximately 50% of their genetic material, similar to non-twin siblings, while monozygotic twins share 100% of their genetic material. Therefore, if the trait is more common in dizygotic twins, it implies that genetic factors play a significant role in the development of that trait. However, it's important to note that this conclusion is based on the assumption that dizygotic twins share similar environmental influences as monozygotic twins. If not this False
