What Has Been Suggested by Research on Fraternal and Identical

question 65

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.

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