Q. No.Consider the following two statements:
| I: | In spite of having more than 70 percent of the world's livestock population, the contribution of India and China to the world's farm produce is only 25 percent. |
| II: | The productivity per unit of cattle in these countries is very low. |
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. Both statements are not true
Regarding out-breeding, the number of correct statements is:
| I. | Out-crossing is the practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4-6 generations. |
| II. | Out-crossing is the best breeding method for animals that are below average in productivity in milk production, growth rate in beef cattle, etc. |
| III. | A single outcross often helps to overcome inbreeding depression. |
| IV. | In cross-breeding superior males of one breed are mated with superior females of another breed. |
| V. | Cross-breeding allows the desirable qualities of two different breeds to be combined. |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
The purposeful manipulation of plant species in order to create desired plant types that are better suited for cultivation, give better yields, and are disease resistant is called:
| 1. | Breeding | 2. | Genetic farming |
| 3. | Phytoremediation | 4. | r DNA technology |
1. Domesticated varieties
2. Mutation breeding
3. Micro-propagation
4. recombinant DNA technology
Today, all our major food crops are derived from:
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture
Classical plant breeding involves:
| 1. | Crossing or hybridization of pure lines and hardening |
| 2. | Crossing or hybridization of wild varieties and artificial selection |
| 3. | Crossing or hybridization of wild varieties and inbreeding |
| 4. | Crossing or hybridization of pure lines and artificial selection |
| Assertion (A): | Collection and preservation of all the wild varieties of crops is important for an effective germplasm collection. |
| Reason (R): | In many crops, pre-existing genetic variability is available from wild relatives of the crop. |
| 1. | Both (A) and (R) are false. |
| 2. | Both (A) and (R) are true but (R) does not explain (A). |
| 3. | Assertion is true but (R) is false. |
| 4. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
Consider the following two statements:
| I: | An effective germplasm collection is the prerequisite of any successful plant breeding programme. |
| II: | Genetic variability is the root of any breeding programme. |
1. Both I and II are true and II explains I.
2. Both I and II are true but II does not explain I.
3. I is true but II is false.
4. I is false but II is true.
Cross hybridisation among the selected parents is frequently used for the improvement of crop plants. Which of the following is not a shortcoming of the process?
| 1. | The combination of desired characters may always not be possible |
| 2. | It can be a tedious and time-consuming process |
| 3. | Undesirable characters may get introduced |
| 4. | The number of progeny is very limited |
Which step in the plant breeding program actually brings about the improvement in crops?
1. Collection of variability
2. Evaluation and selection of parents
3. Cross-hybridization among selected parents
4. Selection and testing of superior recombinants
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