Color Blindness Is Caused by

question 140

Multiple Choice

Color blindness is caused by

• A)changes in the optic nerve.
• B)changes in the genes which control the pigments in the rods.
• C)changes in the genes which control the pigments in the cones.
• D)recessive genes on the Y chromosome.

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Definitions:

Disease X

An unnamed pathogen designated by the World Health Organization as potentially causing a future epidemic.

Smokers

Individuals who regularly inhale tobacco smoke, particularly from cigarettes.

Nonsmokers

Individuals who do not smoke cigarettes or use tobacco products, often assessed in studies for health risk comparisons.

Exposure

refers to the contact with a disease-causing factor or the amount of the factor that impinges upon a person or group.