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A colour blindness problem - NEET PDF Download
A colour blind man marries a woman with normal sight who has no history of colour blindness inher family.What is the probability of their grandson being colour blind? ans is nil but how?
Ref: https://edurev.in/question/436390/A-colour-blind-man-marries-a-woman-with-normal-sight-who-has-no-history-of-colour-blindness-inher-fa
Nil
When a colour blind (XCY) marries to a woman with normal sight (XX) who has no family history of colour blindness, all of their sons will be normal pure and all of their daughters will be carriers as shown below:
So in the next generation, the children of all of their son will be normal in all conditions(except the case in which the wife involved is not carrier neither colour blind). For carrier daughters.
(i) If they many to a normal man 50% of their grandsons will become colour blind as
(ii) If carrier daughter marries to a colour blind man 50% of their grandson will be colour blind along with 50% of the grand daughter while rest 50% of the grand daughters will be carriers as
So in both the above cases, the result shows 50% of grand sons will be colour blind which in terms of over all progress (son + daughter) comes as 25% thus confirming the probability as 0.25.
FAQs on A colour blindness problem - NEET
| 1. What is colour blindness? |  |
Ans. Colour blindness, also known as color vision deficiency, is a condition where an individual is unable to perceive or distinguish certain colors or shades. This occurs due to a defect or absence of certain cells in the retina that are responsible for detecting and interpreting colors.
| 2. How common is colour blindness? | |
Ans. Colour blindness is quite common, affecting approximately 1 in 12 men and 1 in 200 women worldwide. It is more prevalent in males because the genes responsible for color vision deficiency are carried on the X chromosome, and males only have one X chromosome.
| 3. Can colour blindness be inherited? | |
Ans. Yes, colour blindness is often inherited. It is mainly passed down through the X chromosome, which means it is more commonly inherited from the mother. However, it can also occur due to certain genetic mutations or as a result of damage to the retina or optic nerve.
| 4. What are the different types of colour blindness? | |
Ans. There are several types of colour blindness, including red-green color blindness, blue-yellow color blindness, and total color blindness (achromatopsia). Red-green color blindness is the most common type, where individuals have difficulty distinguishing between shades of red and green.
| 5. Can colour blindness affect daily life and career choices? | |
Ans. Yes, colour blindness can have an impact on daily life and career choices. It may make it challenging to distinguish traffic lights, read maps or charts, and identify certain objects or signs. In terms of career choices, certain professions such as pilots, electricians, and designers may require normal color vision. However, many individuals with color vision deficiency lead successful and fulfilling lives in various fields.
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