18. The fact that f...
 
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18. The fact that fraternal twins are more similar in intelligence than ordinary siblings suggests the importance of

 

Aamir Ranjha
(@aamir)
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Joined: 2 years ago
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The fact that fraternal twins are more similar in intelligence than ordinary siblings suggests the importance of

  1. common hereditary factors.
  2. common environmental factors.
  3. genetic effects.
  4. effects of intrauterine environment.

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Answer
2. common environmental factors.


   
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