Multiple Choice
What has been suggested by research on fraternal and identical twins?
A) The research has been mostly inconclusive.
B) Nearly all of the variation in memory scores may be accounted for by differences in the environment and upbringing.
C) More than half of the variation in memory scores may be accounted for by differences in genetic makeup.
D) Nearly all of the variation in memory scores may be accounted for by differences in genetic makeup.
Correct Answer:

Verified
Correct Answer:
Verified
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