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How many phenotypes can occur in the human blood group ABO with alleles IA IB i?
- a)2
- b)4
- c)3
- d)1
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
How many phenotypes can occur in the human blood group ABO with allele...
The correct answer is 3. In the ABO blood group system, there are three alleles: IA, IB, and i. The IA and IB alleles are co-dominant, while the i allele is recessive to both IA and IB.
The possible genotypes and corresponding phenotypes are as follows:
- IAIA or IAi genotype results in blood type A phenotype.
- IBIB or IBi genotype results in blood type B phenotype.
- IAIB genotype results in blood type AB phenotype.
- ii genotype results in blood type O phenotype.
Therefore, there are three possible phenotypes: A, B, and AB. The O blood type is not considered a distinct phenotype but rather a lack of the A or B antigen expression.
Most Upvoted Answer
How many phenotypes can occur in the human blood group ABO with allele...
Introduction to ABO Blood Group System
The ABO blood group system in humans is determined by three alleles: IA, IB, and i. These alleles combine to form different blood types, which are recognized as phenotypes.
Alleles and Their Combinations
- IA: Represents the A antigen.
- IB: Represents the B antigen.
- i: Represents the absence of A or B antigens.
Possible Genotypes
The genotypes that can arise from these alleles are:
1. IAIA: Results in phenotype A.
2. IAi: Also results in phenotype A.
3. IBIB: Results in phenotype B.
4. IBi: Also results in phenotype B.
5. IAIB: Results in phenotype AB.
6. ii: Results in phenotype O.
Resulting Phenotypes
From the combinations above, the following four distinct phenotypes can occur:
1. Phenotype A (IAIA or IAi)
2. Phenotype B (IBIB or IBi)
3. Phenotype AB (IAIB)
4. Phenotype O (ii)
Conclusion
Therefore, the correct answer is option ‘C’. There are four distinct phenotypes resulting from the combination of the IA, IB, and i alleles in the ABO blood group system. Each phenotype is crucial for blood transfusions and compatibility, highlighting the importance of understanding blood group genetics.
The ABO blood group system in humans is determined by three alleles: IA, IB, and i. These alleles combine to form different blood types, which are recognized as phenotypes.
Alleles and Their Combinations
- IA: Represents the A antigen.
- IB: Represents the B antigen.
- i: Represents the absence of A or B antigens.
Possible Genotypes
The genotypes that can arise from these alleles are:
1. IAIA: Results in phenotype A.
2. IAi: Also results in phenotype A.
3. IBIB: Results in phenotype B.
4. IBi: Also results in phenotype B.
5. IAIB: Results in phenotype AB.
6. ii: Results in phenotype O.
Resulting Phenotypes
From the combinations above, the following four distinct phenotypes can occur:
1. Phenotype A (IAIA or IAi)
2. Phenotype B (IBIB or IBi)
3. Phenotype AB (IAIB)
4. Phenotype O (ii)
Conclusion
Therefore, the correct answer is option ‘C’. There are four distinct phenotypes resulting from the combination of the IA, IB, and i alleles in the ABO blood group system. Each phenotype is crucial for blood transfusions and compatibility, highlighting the importance of understanding blood group genetics.
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How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer? for Delhi Police Constable 2025 is part of Delhi Police Constable preparation. The Question and answers have been prepared according to the Delhi Police Constable exam syllabus. Information about How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Delhi Police Constable 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer?.
How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer? for Delhi Police Constable 2025 is part of Delhi Police Constable preparation. The Question and answers have been prepared according to the Delhi Police Constable exam syllabus. Information about How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Delhi Police Constable 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for How many phenotypes can occur in the human blood group ABO with alleles IA IB i?a)2b)4c)3d)1Correct answer is option 'C'. Can you explain this answer?.
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