Q. No.The genotypic expression seen in a person of blood group AB is called
1. dominant-recessive.
2. codominance.
3. incomplete dominance.
4. corecession.
1. dominant-recessive.
2. codominance.
3. incomplete dominance.
4. corecession.
Subtopic: Â Co-dominance |
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There are three alleles for the ABO blood group system in humans. What is the total number of genotypic combinations possible?
1. 3
2. 4
3. 6
4. 9
1. 3
2. 4
3. 6
4. 9
Subtopic: Â Co-dominance |
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The F2 phenotypic and genotypic ratios are identical in:
1. Only A and B
2. Only A and C
3. Only A
4. Only B and C
| A: | Complete dominance |
| B: | Incomplete dominance |
| C: | Co-dominance |
1. Only A and B
2. Only A and C
3. Only A
4. Only B and C
Subtopic: Â Monohybrid Cross: 1 |Â Law of Segregation and Law of Independent Assortment |Â Co-dominance |
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Multiple alleles control inheritance of
| 1. | Phenylketonuria | 2. | Colour blindness |
| 3. | Sickle cell | 4. | Blood groups |
Subtopic: Â Co-dominance |
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In ABO blood group system, the number of alleles, the number of genotypes and the number of phenotypes possible respectively is:
| 1. | 3, 4 and 6 | 2. | 3, 6 and 4 |
| 3. | 2, 4 and 6 | 4. | 2, 6 and 4 |
Subtopic: Â Co-dominance |
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| Assertion(A): | The genotype of an individual with A group blood could be IAi but O group genotype can only be ii. |
| Reason(R): | The allele i is recessive to allele IA |
| 1. | Both (A) and (R) are True and (R) is correct explanation of (A) |
| 2. | Both (A) and (R) are True and (R) is not correct explanation of (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Â Co-dominance |
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In pea seeds, starch synthesis in pea seeds is controlled by one gene. A plant with genotype Bb will produce:
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
I: large starch grains
II: smaller starch grains
III: intermediate sized starch grains
IV: round seeds
V: wrinkled seeds
1. Only I and IV
2. Only II and V
3. Only III and IV
4. Only III and V
Subtopic: Â Co-dominance |
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Person with blood group AB is considered as universal recipient because he has:
| 1. | both A and B antigens on RBC but no antibodies in the plasma. |
| 2. | both A and B antibodies in the plasma. |
| 3. | no antigen on RBC and no antibody in the plasma |
| 4. | both A and B antigens in the plasma but no antibodies |
Subtopic: Â Co-dominance |
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The mother has A+ blood group, the father has B+ and the child is A+. What can be possible genotypes of all three, respectively?
A. IAIA | IBi | IBi
B. IAIA | IBi | IAi
C. IB i IA IA| IA IB
D. IAIA | IBIB | IAi
E. IA | IBi | IAi
Choose the correct answer from the options given below:
1. C and D
2. D and A
3. A and B
4. B and E
A. IAIA | IBi | IBi
B. IAIA | IBi | IAi
C. IB i IA IA| IA IB
D. IAIA | IBIB | IAi
E. IA | IBi | IAi
Choose the correct answer from the options given below:
1. C and D
2. D and A
3. A and B
4. B and E
Subtopic: Â Co-dominance |
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Level 1: 80%+
NEET - 2024
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Consider the given two statements:
Which statement correctly distinguishes incomplete dominance from co-dominance?
| Statement I: | In snapdragon, pink flowers (RR crossed with rr) result because neither red nor white pigment dominates, producing an intermediate phenotype. |
| Statement II: | In human ABO blood groups, IA and IB alleles both express their sugars on RBC surface simultaneously. |
| 1. | Statement I shows co-dominance; Statement II shows incomplete dominance |
| 2. | Both statements show incomplete dominance with different mechanisms |
| 3. | Statement I shows incomplete dominance; Statement II shows codominance |
| 4. | Both statements show co-dominance but in different organ systems |
Subtopic: Â Dominance Deviation from Mendel: 1 |Â Dominance Deviation from Mendel: 2 |Â Co-dominance |
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