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daniellelady daniellelady
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6 years ago
Researchers are conducting studies to determine genetic factors associated with stuttering. The phenomena which may have led to these studies include
 
  a) Stuttering occurs more often in males than in females
  b) Approximately half of all persons who stutter have a relative who stuttered or recovered from stuttering
  c) Stuttering occurs more often in twins
  d) All of the above
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6 years ago
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