In the human beings, the carrier of color blind is:
Correct answer: B. Female
- A. Male
- B. Female
- C. Both male and female
- D. None of them
Explanation
Color blindness is an X-linked recessive trait, meaning it is carried on the X chromosome. Females, having two X chromosomes, can be carriers if they have one normal and one affected X chromosome. They usually do not express the trait unless both X chromosomes carry the gene for color blindness, which is rare. Males, with one X and one Y chromosome, will express the trait if their single X chromosome carries the gene, thus they cannot be carriers. Therefore, the carrier of color blindness is typically female, as only they can carry one affected and one unaffected X chromosome without expressing the trait.
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About X-linked Recessive Inheritance
X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.
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