Which of the Following Provides Some Evidence That There Is

question 24

Multiple Choice

Which of the following provides some evidence that there is, in fact, a genetic component to handedness?

• A) ​Between monozygotic twins, the likelihood that both children have the same dominant hand is no greater than between fraternal twins or non-twin siblings.
• B) ​As teachers have stopped encouraging children to use their right hands, the percentage of left-handed children has risen.
• C) ​Societies have favored right-handed people in their design of common objects, such as scissors, can-openers, and school desks.
• D) ​The part of the brain that controls handedness, the substantia nigra, develops more fully in right-handed children than in left-handed children.