MCQ Plant Breeding, Class 12 Biology

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. What is Triticale?

It is an intergeneric hybrid.

It is a new plant produced by selection.

It is a wild ancestral wheat.

It is a modified form of wheat.

Question 1 of 20

2. Mutations can be induced by

Gamma rays

Mutagenic radiations (UV rays, X-rays)

Nitrous acid, nitromethyl urea

All of the above

Question 2 of 20

3. Heterosis is

Hybrid compatibility

Hybrid vigour

Pollen sterility

Pollen-pistil incompatibility

Question 3 of 20

4. Hybrid vigour is due to

Emasculation

Linkage

Homozygosity

Heterozygosity

Question 4 of 20

5. Most cultivated plants are

Aneuploids

Allopolyploids

Autopolyploids

Haploids

Question 5 of 20

6. Germplasm includes

Cultivated improved varieties

Varieties which are no more in cultivation

Wild and obsolete plants

All of the above

Question 6 of 20

7. The process of bringing wild species of plants under cultivation to suit human needs is called

Selection

Domestication

Hybridisation

Cultivation

Question 7 of 20

8. The species of Saccharum originally grown in India was

S. boulardii

S. barberi

S. officinarum

S. munja

Question 8 of 20

9. What made Dr M. S. Swaminathan famous?

Being a horticulturist

Being a geneticist

Being a plant breeder

All of the above

Question 9 of 20

10. The biggest constraint of plant breeding is

Trained manpower

Transfer of genes from unrelated sources

Availability of the desirable gene in the crop and its wild relatives

Infrastructure

Question 10 of 20

11. Which chemical is used for induction of polyploidy?

IAA

Cytokinin

Nitrous acid

Colchicine

Question 11 of 20

12. Genetic diversity in agricultural crops is threatened by

Intensive use of biopesticides

Introduction of high-yielding varieties

Extensive intercropping

Extensive use of fertilisers

Question 12 of 20

13. At cryopreservation of germplasm, biological activity

Essentially ceases

Cell division stops

No genetic change occurs

All of the above

Question 13 of 20

14. Emasculation is required for

Selective hybridisation

Natural hybridisation

Self-pollination

Pure lines

Question 14 of 20

15. The scientific process by which crop plants are enriched with certain desirable nutrients is called

Breeding

Biofortification

Crop protection

Bioremediation

Question 15 of 20

16. The most likely reason for the development of resistance against pesticides in insect-damaged crop is

Random mutations

Acquired heritable changes

Genetic recombination

Directed mutations

Question 16 of 20

17. Triticale is produced by the crossing of

Wheat and maize

Rye and maize

Wheat and rye

Wheat and barley

Question 17 of 20

18. Norman Borlaug, known as 'Father of the Green Revolution', had developed a new cultivated variety of

Sugarcane

Wheat

Paddy

Rice

Question 18 of 20

19. A collection of all the alleles of all the genes of a crop plant is called

Somaclonal collection

Germplasm collection

Herbarium

Protoplasm collection

Question 19 of 20

20. Monosomy and trisomy can be represented as

2n − 1, 2n − 2

2n, 2n + 1

2n − 1, 2n + 1

2n + 1, 2n + 3

Question 20 of 20

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