Q. No.Consider the following statements regarding inbreeding in animal husbandry:
I.
Inbreeding refers to the mating of more closely related individuals within the same breed for 4-6 generations.
II.
Inbreeding increases homozygosity and is necessary if we want to evolve a pure line in any animal.
III.
Inbreeding exposes harmful recessive genes that are eliminated by selection and helps in the accumulation of superior genes.
IV.
Continued inbreeding usually reduces fertility and even productivity, called inbreeding depression, which can be overcome by mating selected animals of the breeding population with unrelated superior animals of the same breed.
The correct statements are:
1.
I, II and III only
2.
II, III and IV only
3.
I, II and IV only
4.
I, II, III and IV
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
There are several species of honeybees that can be reared. From the options given below identify the species reared in India:
| 1. | Apisindica | 2. | Apisdorsata |
| 3. | Trigonairidipennis | 4. | Apismellifera |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Identify the variety of sugarcane from which [with hybrids] about 70% of the sugar produced worldwide comes:
| 1. | Saccharumbarberi | 2. | Saccharumsinense |
| 3. | Saccharumofficinarum | 4. | Saccharumspontaneum |
Insect resistance in host crop plants may be due to morphological, biochemical, or physiological characteristics. Identify the correct statements:
| I: | Hairy leaves in several plants are associated with resistance to jassids in cotton and cereal leaf beetle in wheat. |
| II: | In wheat, solid stems lead to non-preference by the stem sawfly and smooth-leaved and nectar-less cotton varieties do not attract bollworms. |
| III. | High aspartic acid, low nitrogen and sugar content in maize lead to resistance to maize stem borers. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Match biofortified crops in Column I with enriched nutrients in Column II and select the correct answer from the codes given:
|
|
Column I |
|
Column II |
|
A. |
Maize hybrids |
a. |
lysine and tryptophan |
|
B. |
Atlas 66 |
b. |
high protein content |
|
C. |
Golden rice |
c. |
Vitamin A |
Code
| A | B | C | |
| 1. | a | b | c |
| 2. | a | c | b |
| 3. | b | a | c |
| 4. | c | a | b |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Which of the following is the most important factor that would lead to increased milk yield
in cattle?
1. Selection of good breeds
2. Selection of good breeds
3. Stringent cleanliness and hygiene
4. Provision of ideal environmental conditions for cattle
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
© 2024 GoodEd Technologies Pvt. Ltd.