Monozygotic twins separated at birth are used to compare the effects of genetics versus environment and health because
a. they share an identical genome.
b. monozygotic twins have different sex chromosomes.
c. it is easier to do because siblings are separated at the time of adoption.
d. genetics, environment, and health issues are stable in a study group.
A
Studies of identical twins offer a unique opportunity to investigate the association of genetics, environment, and health. Identical twins are monozygotic and share an identical genome. Monozygotic twins are the same sex. Studies occur much less frequently today because tremendous efforts are made to keep siblings together when they are adopted. Genetics can be stable in a study group, but the environment and health issues are dynamic even in a controlled study group.
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