Q. No.Person having genotype IA IB would show the blood group as AB. This is because of:
1. Pleiotropy
2. Co-dominance
3. Segregation
4. Incomplete dominance
In the F2 generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are:
1. phenotypes - 4; genotypes - 16
2. phenotypes - 9; genotypes - 4
3. phenotypes - 4; genotypes - 8
4. phenotypes - 4; genotypes – 9
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Mother and father of a person with ‘O’ blood group have ‘A’ and ‘B’ blood group, respectively. What would be the genotype of both mother and father?
1. Mother is homozygous for ‘A’ blood group and father is heterozygous for ‘B’
2. Mother is heterozygous for ‘A’ blood group and father is homozygous for ‘B’
3. Both mother and father are heterozygous for ‘A’ and ‘B’ blood group, respectively
4. Both mother and father are homozygous for ‘A’ and ‘B’ blood group, respectively
The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because “O” in it refers to having:
| 1. | No anitgens A and B on RBCs |
| 2. | Other antigens besides A and B on RBCs |
| 3. | Overdominance of this type on the genes for A and B types |
| 4. | One antibody only - either anti-A or anti-B on the RBCs |
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The inheritance of flower colour in dog flower and 4’O clock plant exhibits:
| 1. | Complete dominance | 2. | Incomplete dominance |
| 3. | Co-dominance | 4. | Lethality |
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Occasionally, a single gene product may produce more than one effect. Such a gene is said to be:
| 1. | Pleiotropic | 2. | Polygenic |
| 3. | Psuedoallele | 4. | Housekeeping |
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Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?
| 1. | 1 | 2. | 7 |
| 3. | 2 | 4. | 3 |
In Mendel’s experiments, the contrasting traits did not show any blending in:
| 1. | F1 stage |
| 2. | F2 stage |
| 3. | Both F1 and F2 stages |
| 4. | The statement is false as blending was seen at all stages |
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Blood group antigens are:
| 1. | Carbohydrates present in plasma |
| 2. | Carbohydrates present on the surface of RBCs |
| 3. | Plasma proteins |
| 4. | Proteins present on the surface of RBCs |
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To study whether a gene exhibits multiple allelism or not, one must study:
| 1. | An individual | 2. | A population |
| 3. | A species | 4. | With concentration! |
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