MHT CET · BIOLOGY · STD 12 - 3. Inheritance and Variation
What will be the genotypes of the parents of a colorblind daughter and a colorblind son?
- A Father \(-X^C Y\) and mother \(-X^C X^C\)
- B Father \(-X^C Y\) and mother \(-X^C X^c\)
- C Father \(-X^c Y\) and mother \(-X^C X^C\)
- D Father \(-X^c Y\) and mother \(-X^c X^c\)
Answer & Solution
Correct Answer
(D) Father \(-X^c Y\) and mother \(-X^c X^c\)
Step-by-step Solution
Detailed explanation
Colourblindness is an X linked recessive disorder. Both the children (male/ female) are colourblind, hence both the parents need to have the defective gene. The mother may either be a carrier for the gene \(\left(X^C X^c\right)\) or colourblind \(\left(X^c X^c\right)\). However, from the given options the only possibility is Father \(-X^c Y\) and mother - \(\left(X^c X^c\right)\)
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