Understanding Left-Handedness

What common challenge is humorously highlighted for left-handed people at the beginning of the video?

• Using right-handed scissors

• Writing with a pen

• Driving a car

• Playing musical instruments

What was the traditional belief about what determines whether a person is left or right-handed?

• The environment during childhood

• The dominant hand of the parents

• The spinal cord

• The dominant hemisphere of the brain

According to new research, what part of the body is responsible for determining handedness?

• The lungs

• The heart

• The spinal cord

• The brain

At what stage in development does the spinal cord make the decision about handedness?

• During the first year of life

• During adolescence

• After 15 weeks in the womb

• At birth

What is the role of gene expressions in determining handedness?

• They have no role

• They influence the brain's decision

• They guide the spinal cord's decision

• They determine the strength of the hands