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Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on
[1993]
- a)X-chromosome of father
- b)Y-chromosome of father
- c)one X-chromosome of mother
- d)both the X-chromosomes of mother
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Of a normal couple, half the sons are haemophilic while half the daugh...
Since half the sons are haemophilic so the genes for haemophilia is located on X-chromosome of mother.
Most Upvoted Answer
Of a normal couple, half the sons are haemophilic while half the daugh...
Explanation:
The inheritance of hemophilia, a blood clotting disorder, is linked to the X-chromosome. Hemophilia is a recessive disorder, meaning that an individual must inherit two copies of the defective gene (one from each parent) to express the disorder.
Normal couple:
A normal couple consists of a male (XY) and a female (XX). The male has one X-chromosome and one Y-chromosome, while the female has two X-chromosomes.
Inheritance of hemophilia:
- Hemophilia is caused by a defective gene located on the X-chromosome.
- Females have two X-chromosomes, so even if one X-chromosome carries the defective gene, the other X-chromosome can compensate for it, resulting in carrier status. Carriers do not express the disorder but can pass it on to their offspring.
- Males have one X-chromosome and one Y-chromosome. If their X-chromosome carries the defective gene, they will express the disorder because they do not have another X-chromosome to compensate for it.
Percentage of affected offspring:
- In a normal couple, the probability of a son inheriting the defective gene and expressing the disorder is 50% because he can only inherit the defective gene from his mother.
- The probability of a daughter inheriting the defective gene and being a carrier is also 50% because she can inherit the defective gene from either her mother or her father.
Correct answer:
The correct answer is option 'C' - the defective gene is located on one X-chromosome of the mother. This is because the mother passes one of her X-chromosomes to each of her offspring. If the mother carries the defective gene on one of her X-chromosomes, there is a 50% chance that she will pass it on to her sons, making them hemophilic. Daughters have a 50% chance of inheriting the defective gene from their mother, making them carriers.
The inheritance of hemophilia, a blood clotting disorder, is linked to the X-chromosome. Hemophilia is a recessive disorder, meaning that an individual must inherit two copies of the defective gene (one from each parent) to express the disorder.
Normal couple:
A normal couple consists of a male (XY) and a female (XX). The male has one X-chromosome and one Y-chromosome, while the female has two X-chromosomes.
Inheritance of hemophilia:
- Hemophilia is caused by a defective gene located on the X-chromosome.
- Females have two X-chromosomes, so even if one X-chromosome carries the defective gene, the other X-chromosome can compensate for it, resulting in carrier status. Carriers do not express the disorder but can pass it on to their offspring.
- Males have one X-chromosome and one Y-chromosome. If their X-chromosome carries the defective gene, they will express the disorder because they do not have another X-chromosome to compensate for it.
Percentage of affected offspring:
- In a normal couple, the probability of a son inheriting the defective gene and expressing the disorder is 50% because he can only inherit the defective gene from his mother.
- The probability of a daughter inheriting the defective gene and being a carrier is also 50% because she can inherit the defective gene from either her mother or her father.
Correct answer:
The correct answer is option 'C' - the defective gene is located on one X-chromosome of the mother. This is because the mother passes one of her X-chromosomes to each of her offspring. If the mother carries the defective gene on one of her X-chromosomes, there is a 50% chance that she will pass it on to her sons, making them hemophilic. Daughters have a 50% chance of inheriting the defective gene from their mother, making them carriers.
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Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer?
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Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. 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 Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer?.
Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. 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 Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer?.
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Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Of a normal couple, half the sons are haemophilic while half the daughters are carriers. The gene is located on[1993]a)X-chromosome of fatherb)Y-chromosome of fatherc)one X-chromosome of motherd)both the X-chromosomes of motherCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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