Q. No.Consider the two statements:
I:
Inbreeding is an important strategy in animal breeding experiments.
II:
It exposes recessive harmful genes that are eliminated by selection.
1.
Both I and II are correct and II explains I.
2.
Both I and II are correct but II does not explain I.
3.
Only I is correct.
4.
Both I and II are incorrect.
In mung bean, resistance to yellow mosaic virus and powdery mildew was introduced by:
| 1. | Agrobacterium mediation | 2. | Somatic hybridization |
| 3. | Micropropagation | 4. | Mutation breeding |
The best breeding method for animals that are below average in productivity in milk production is:
| 1. | Inbreeding | 2. | Out-crossing |
| 3. | Cross-breeding | 4. | Interspecific hybridization |
Identify the row where the crop [Column I], its variety [Column II] and resistance to disease/pest [Column III] are all correctly matched:
|
COLUMN I |
COLUMN II |
COLUMN III |
|
|
1. |
Brassica |
Himgiri |
White rust |
|
2. |
Cowpea |
Pusa Komal |
Bacterial blight |
|
3. |
Flat bean |
Pusa Sem 2 |
Shoot and fruit borer |
|
4. |
Okra |
Pusa Gaurav |
Aphids |
Conventional breeding is often constrained by the availability of a limited number of disease-resistance genes that are present and identified in various crop varieties or wild relatives. This is most commonly overcome by:
| 1. | Inducing mutations | 2. | Somaclonal variations |
| 3. | Genetic engineering | 4. | Plant introduction |
Arrange the following steps of a plant breeding program in a correct chronological manner:
| I. | Selection and testing of superior recombinants |
| II. | Collection of variability |
| III. | Cross hybridisation among the selected parents |
| IV. | Evaluation and selection of parents |
| V. | Testing, release, and commercialisation of new cultivars |
| 1. | II, IV, I, III, V | 2. | IV, I, II, III, V |
| 3. | II, IV, III, I, V | 4. | IV, III, II, I, V |
Hisardale is a new breed of:
| 1. | Sheep developed by crossing Bikaneri ewes and Marino rams. |
| 2. | Sheep developed by crossing Bikaneri rams and Marino ewes. |
| 3. | Goat developed by crossing Bikaneri ewes and Marino rams. |
| 4. | Goat developed by crossing Bikaneri rams and Marino ewes. |
Before releasing new cultivars in plant breeding programs, their testing includes all the following except:
| 1. | growing these in the research fields and recording their performance under ideal fertiliser application, irrigation, and other crop management practices. |
| 2. | testing the materials in farmers’ fields, for one growing season at selected locations in the country |
| 3. | comparison to the best available local crop cultivar – a check or reference cultivar |
| 4. | taking care of all patent and legal issues |
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.
Amongst the following, the number of freshwater fishes are:
Catla, Rohu, Common carp, Hilsa, Sardines, Mackerel, Pomfrets.
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
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