Question:
Identify the INCORRECT statement about red-green color blindness in human.
Identify the INCORRECT statement about red-green color blindness in human.
Show Hint
Colour blindness is X-linked recessive, and a father passes his Y chromosome, not his X, to his sons.
Updated On: Nov 12, 2026
- It is a disorder where a person fails to distinguish between red and green colours.
- It is due to the absence of cones in the retina of the eye.
- It is inherited from a colorblind father to his son.
- A dominant X linked gene is necessary for the formation of cones.
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Red-green colour blindness is an X-linked recessive disorder. The person cannot tell red from green because the gene for normal cone pigments is faulty or missing.
Step 2: Check the inheritance
A father gives his X chromosome to his daughters and his Y chromosome to his sons.
So a colour-blind father cannot pass the allele to his son. Sons get it from their carrier mother.
Step 3: Compare the options
Option (A) describes the disorder correctly. Option (D) correctly says a dominant X-linked gene is needed for normal cones. Option (C) says it passes from father to son, which is wrong.
Final Answer:
The incorrect statement is that it is inherited from a colour-blind father to his son. \[ \boxed{\text{(C) }\text{It is inherited from a colorblind father to his son.}} \]
Red-green colour blindness is an X-linked recessive disorder. The person cannot tell red from green because the gene for normal cone pigments is faulty or missing.
Step 2: Check the inheritance
A father gives his X chromosome to his daughters and his Y chromosome to his sons.
So a colour-blind father cannot pass the allele to his son. Sons get it from their carrier mother.
Step 3: Compare the options
Option (A) describes the disorder correctly. Option (D) correctly says a dominant X-linked gene is needed for normal cones. Option (C) says it passes from father to son, which is wrong.
Final Answer:
The incorrect statement is that it is inherited from a colour-blind father to his son. \[ \boxed{\text{(C) }\text{It is inherited from a colorblind father to his son.}} \]
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