MHT CET 202622 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 22 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Principles of Inheritance and Variation
MHT CET 2026 · 22 April · Evening Shift · Biology · Principles of Inheritance and Variation
Identify the INCORRECT statement about red-green color blindness in...
Identify the INCORRECT statement about red-green color blindness in human.
Options
- AIt is a disorder where a person fails to distinguish between red and green colours.
- BIt is due to the absence of cones in the retina of the eye.
- CIt is inherited from a colorblind father to his son.
- DA dominant X linked gene is necessary for the formation of cones.
Correct answer
C. It is inherited from a colorblind father to his son.
Step-by-step solution
Red-green colour blindness is a sex-linked recessive disorder caused by a defect in the genes located on the X chromosome.
Males have an XY sex chromosome pair, while females have XX. A father passes his Y chromosome to his son and his X chromosome to his daughter.
Since the gene for red-green colour blindness is present on the X chromosome, a colourblind father cannot pass this defective gene to his son. Instead, criss-cross inheritance is observed where the trait is passed from a carrier mother to her son.
Thus, the statement that it is inherited from a colourblind father to his son is incorrect.
Answer: It is inherited from a colorblind father to his son.
Males have an XY sex chromosome pair, while females have XX. A father passes his Y chromosome to his son and his X chromosome to his daughter.
Since the gene for red-green colour blindness is present on the X chromosome, a colourblind father cannot pass this defective gene to his son. Instead, criss-cross inheritance is observed where the trait is passed from a carrier mother to her son.
Thus, the statement that it is inherited from a colourblind father to his son is incorrect.
Answer: It is inherited from a colorblind father to his son.