| 1. | Fusion of two male gametes of a pollen tube with two different eggs |
| 2. | Fusion of one male gamete with two polar nuclei |
| 3. | Fusion of two male gametes with one egg |
| 4. | Syngamy and triple fusion |
In some plants, the thalamus contributes to fruit formation. Such fruits are termed as:
1. False fruits
2. Aggregate fruits
3. True fruits
4. Parthenocarpic fruits
Match the terms in Column-I with their description in Column-II and choose the correct option.
| Column-I | Column-II | ||
| A. | Dominance | 1. | Many govern a single character |
| B. | Codominance | 2. | In a heterozygous organism, only one allele expresses itself |
| C. | Pleiotropy | 3. | In a heterozygous organism, both alleles express themselves fully |
| D. | Polygenic inheritance | 4. | A single gene influences many characters |
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 4 | 1 | 2 | 3 |
| 3. | 4 | 3 | 1 | 2 |
| 4. | 2 | 1 | 4 | 3 |
The mechanism that causes a gene to move from one linkage group to another is called?
1. inversion
2. duplication
3. translocation
4. crossing-over
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red, and pink flowers. Choose the incorrect statement from the following:
| 1. | Law of Segregation does not apply in this experiment. |
| 2. | This experiment does not follow the Principle of Dominance. |
| 3. | The pink colour in F1 is due to incomplete dominance. |
| 4. | Ratio of F2 is 1/4(red):2/4(pink):1/4(white). |
Chromosomal theory of inheritance was proposed by:
| 1. | Sutton and Boveri | 2. | Bateson and Punnet |
| 3. | T. H. Morgan | 4. | Watson and Crick |
2. lactose
3. lactose and galactose
4. glucose
A molecule that can act as a genetic material must fulfill the traits given below, except:
| 1. | it should be able to express itself in the form of 'Mendelian characters' |
| 2. | it should be able to generate its replica |
| 3. | it should be unstable structurally and chemically |
| 4. | it should provide the scope for slow changes that are required for evolution |
During DNA replication, Okazaki fragments are used to elongate:
| 1. | The lagging strand towards the replication fork. |
| 2. | The leading strand away from the replication fork. |
| 3. | The lagging strand away from the replication fork. |
| 4. | The leading strand towards the replication fork. |
From the following, identify the correct combination of salient features of the Genetic Code:
| 1. | Universal, Non-ambiguous, Overlapping |
| 2. | Degenerate, Overlapping, Commaless |
| 3. | Universal, Ambiguous, Degenerate |
| 4. | Degenerate, Non-overlapping, Non-ambiguous |
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