Researchers are conducting studies to determine genetic factors associated with stuttering.The phenomena which may have led to these studies include

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All of the given options are phenomena that may have led to the study of the genetic factors associated with stuttering. Stuttering is known to occur more often in males than in females, and approximately half of all persons who stutter have a relative who stuttered or recovered from stuttering. Stuttering also occurs more often in twins, which suggests a possible genetic component to the disorder.

Researchers Are Conducting Studies to Determine Genetic Factors Associated with Stuttering.The