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If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness? (NEET 2022)
- a)25%
- b)50%
- c)75%
- d)100%
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
If a colour blind female marries a man whose mother was also colour bl...
If mother of man is colour blind, then man will also be colour blind as colour blindness is a X-linked recessive trait and shows criss-cross inheritance.
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If a colour blind female marries a man whose mother was also colour bl...
Understanding Color Blindness Genetics
Color blindness, particularly red-green color blindness, is a sex-linked recessive trait located on the X chromosome. To understand the inheritance pattern, let’s analyze the genetic makeup of the individuals involved.
Genetic Makeup of Parents
- A color-blind female has the genotype XcXc (both X chromosomes carry the color blindness allele).
- The man, whose mother was color blind, could either be XcY (color-blind) or XY (normal vision). Since his mother was color blind, he must carry the Xc chromosome, making him XcY.
Possible Combinations of Offspring
When these two individuals reproduce, the possible combinations for their children can be outlined as follows:
1. Female offspring (XX):
- From the mother (Xc): Xc
- From the father (Xc): Xc
- Resulting genotype: XcXc (color blind)
2. Male offspring (XY):
- From the mother (Xc): Xc
- From the father (Y): Y
- Resulting genotype: XcY (color blind)
Progeny Outcomes
Based on the combinations:
- All female offspring will be XcXc (100% color blind).
- All male offspring will be XcY (100% color blind).
Thus, every child, regardless of gender, will have color blindness.
Conclusion
Given this genetic analysis, the probability that any child from this union will have color blindness is 100%.
Thus, the correct answer is option 'D' (100%).
Color blindness, particularly red-green color blindness, is a sex-linked recessive trait located on the X chromosome. To understand the inheritance pattern, let’s analyze the genetic makeup of the individuals involved.
Genetic Makeup of Parents
- A color-blind female has the genotype XcXc (both X chromosomes carry the color blindness allele).
- The man, whose mother was color blind, could either be XcY (color-blind) or XY (normal vision). Since his mother was color blind, he must carry the Xc chromosome, making him XcY.
Possible Combinations of Offspring
When these two individuals reproduce, the possible combinations for their children can be outlined as follows:
1. Female offspring (XX):
- From the mother (Xc): Xc
- From the father (Xc): Xc
- Resulting genotype: XcXc (color blind)
2. Male offspring (XY):
- From the mother (Xc): Xc
- From the father (Y): Y
- Resulting genotype: XcY (color blind)
Progeny Outcomes
Based on the combinations:
- All female offspring will be XcXc (100% color blind).
- All male offspring will be XcY (100% color blind).
Thus, every child, regardless of gender, will have color blindness.
Conclusion
Given this genetic analysis, the probability that any child from this union will have color blindness is 100%.
Thus, the correct answer is option 'D' (100%).
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If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer?.
If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?(NEET 2022)a)25%b)50%c)75%d)100% Correct answer is option 'D'. Can you explain this answer?.
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