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Multiple Choice
A baby is born with the normal number and distribution of rods but no cones. What would we expect the baby to be?
A
Unable to see well at night
B
Only able to see color under bright light
C
Totally blind
D
None of the listed responses is correct.
E
Completely color-blind
Verified step by step guidance
1
Begin by understanding the function of rods and cones in the human eye. Rods are responsible for vision in low light conditions and do not detect color, while cones are responsible for color vision and function best in bright light.
Consider the scenario where a baby is born with no cones. This means the baby lacks the cells necessary for detecting color, as cones are the photoreceptor cells responsible for color vision.
Since the baby has a normal number and distribution of rods, they would still be able to see in low light conditions, as rods are specialized for night vision and detecting light intensity.
Without cones, the baby would be unable to perceive any colors, leading to complete color blindness. This is because cones are the only photoreceptors that can differentiate between different wavelengths of light, which correspond to different colors.
Therefore, the expected condition for the baby, given the absence of cones, is complete color blindness, as they would only be able to perceive variations in light and dark without any color differentiation.