Twin Studies
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Chicago Twin Study
Minnesota Twin Study
Case Study Surveys
Conclusion
Sources
Case Study Survey:
-2 identical twins
-3 fraternal twins (males only)
-Survey consisted of questions regarding height, weight, eye color, hair color, handedness, and athletic ability.
Survey Results:
Significance:
-Almost all of the data indicated that identical twins are more similar in traits than fraternal twins
-Confirmed findings of the Chicago twin study