Understanding Handedness and Brain Function

What percentage of humans are left-handed?

• 20%

• 40%

• 30%

• 10%

Which side of the brain is Broca's area typically located in right-handed individuals?

• Right hemisphere

• Left hemisphere

• Neither hemisphere

• Both hemispheres

What is the Right Shift mutation theorized to influence?

• Height

• Language and hand dominance

• Eye color

• Foot size

Why might left-handedness be considered an evolutionary advantage?

• Left-handed individuals can surprise opponents in sports and combat.

• Left-handed individuals are faster runners.

• Left-handed individuals have better eyesight.

• Left-handed individuals have a higher IQ.

What does Chris McManus suggest about left-handers' brains?

• They have random cerebral variation.

• They are more organized.

• They are more symmetrical.

• They are less creative.