The gene for red-green color blindness is present on:
Correct answer: B. X-chromosome
- A. Y-chromosome
- B. X-chromosome
- C. Autosome 7
- D. Autosome 9
Explanation
Red- Green Color blindness is a sex-linked recessive disease which is passed down through the X chromosomes.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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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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