Given what we know about the effects of genes and the environment, which of the following pairs of children would be expected to be most similar in terms of overall personality, psychological disorders, and intelligence?
a. Monozygotic twins, one raised in a wealthy family living in a modern city and the other raised in poverty in a developing nation
b. Adopted children from different biological families raised in the same home
c. Biological siblings raised in the same house
d. Biological siblings, each adopted immediately after birth, one raised in New Orleans and the other in New York City
Question 2
Combining the monozygotic twin and adoption studies, researchers often study identical twins raised in different families. This method helps researchers determine
a. the effects of adoption on a child's gene expression.
b. the effects of adoption on a child's personality.
c. the effect of environment without the confound of shared genes.
d. the effects of genes without the confound of shared environments.
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