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What is colour blindness?...

What is colour blindness?

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The colour blindness in a sex linked character in human being who is unable to distinguish red and green colour. This allele is present in X chromosomes . The recessive form of this allele cannot produce colour sensitive cone cells . Therefore homozygous female of genotype X X and hemizygous X Y males cannot differentiate red and green colour This phenomenon is called colour blindness.
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