Color blindness is inability to distinguish between certain colors. This disease is caused due to a _______.

bacteria

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virus

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defective gene

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fungus

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Solution

The correct option is C
defective gene

Colour blindness is a disease characterised by the inability to distinguish between certain colours. The affected person cannot differentiate mostly between green and red light. This is due to defective gene copies present in their DNA. Thus, colour blindness is an example of a genetic disorder.

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\begin{matrix} Eye diseases & Defect (1) Glaucoma & (A) an infection in the layer of the eye which causes inflammation (2) Colour blindness & (B) increased pressure in the eye which causes damage to the optic nerve (3) Conjunctivitis & (C) lens of the eye becomes opaque resulting in blindness (4) Cataract & (D) inability to distinguish between colours due to defect in photoreceptors \end{matrix}

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