KCET · BIOLOGY · STD 12 - 4. Principles of Inheritance and Variation
More men suffer from colour blindness than women because
- A women are more resistant to disease than men
- B the male sex hormone testosterone causes the disease
- C the colour blind gene is carried on the 'Y' chromosome
- D men are hemizygous and one defective gene enough to make them colour blind.
Answer & Solution
Correct Answer
(D) men are hemizygous and one defective gene enough to make them colour blind.
Step-by-step Solution
Detailed explanation
(D) men are hemizygous and one defective gene enough to make them colour blind.,
More men suffer from colour blindness than women because men are hemizygous and one defective gene is enough to make them colour blind. This is due to the fact than men have only one X-chromosome, so a single recessive allele on this chromosome will result in colour blindness. Women have tow X chromosomes, so they would need to defective copies to be color blind, making it less common in women.
More men suffer from colour blindness than women because men are hemizygous and one defective gene is enough to make them colour blind. This is due to the fact than men have only one X-chromosome, so a single recessive allele on this chromosome will result in colour blindness. Women have tow X chromosomes, so they would need to defective copies to be color blind, making it less common in women.
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