plant breeding and genetics MCQs – Page 20

Practise focused plant breeding and genetics questions with marked answers for exam preparation and subject revision.

plant breeding and genetics Mcqs
381. A species or type of a plant derived from doubling the chromosome of the F1 hybrid of two known species is known as__________________?
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A. Autopolyploid

B. Amphidiploid

C. Autodiploid

D. Hexaploid

382. Argemone mexicana is an objectional wed of__________________?
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A. Barley

B. Oat

C. Rapseed/mustard

D. Tomato

383. Drought is measured in terms of________________?
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A. Yield performance

B. All the above

C. Photosynthesis

D. Root length of seedings

384. The ratio of treatment variance to error variance is known as______________________?
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A. F-value

B. Correction factor

C. Critical difference

D. t-value

385. Organic evolution through large discontinuous variations was propound by__________________?
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A. Darwin

B. Huge and Vnes

C. Mendel

D. Lamak

386. A genetic element which can exist in more than one of the two alternative forms is known as__________________?
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A. Episome

B. Mecrosome

C. Peroxisome

D. Disome

387. Which statement is true___________________?
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A. Etiolation is not a reversible process

B. Etiolation is physiological while albinism is genitival

C. Etiolation and albinism are synonyms

D. Etiolation is genetically while albinism is physiological

388. An auxotroph is_________________?
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A. A plan that is able to synthesize its own carbohydrates

B. non of these

C. An organism that depends on other organism for meting its nutrient requirements

D. A mutant organism which has lost its ability to synthesize one or more essential nutrients
389. Stadler, first used X-rays for induction of mutation in_________________?
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A. Wheat

B. Maize

C. Barley

D. Oat

390. Theory of mutation was given by___________________?
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A. Mendel

B. De Vries

C. Watson

D. Tschermak

391. Who discovered nucleic acid________________?
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A. Van Mohl

B. Schultz

C. Miescher

D. Benda

392. The role of nucleus in regulating the morphology of the plant was discovered in___________________?
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A. Macrospore

B. Maize

C. Acetabularia

D. pea

393. If the offspring of F, (blue) is crossed with white male parent the result will be______________________?
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A. All white

B. All blue

C. All black

D. Half blue and half white
394. Which one of the following is fruit____________________?
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A. Cauliflower

B. Ginger

C. Potato

D. Brinjal
395. A mutation is a change in_________________?
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A. Chromosome structure

B. RNA

C. DNA

D. Chromosome number
396. Self-incompatibility is controlled by_________?
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A. Multiple alleles

B. Polygenes

C. Plasmogenes

D. Both B and C

397. In line x tester cross mating is done between:
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A. Males & females

B. Among males

C. All of these

D. Among females

398. In spermatogenesis, each spermatogonium increases in size to form a __________?
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A. Spermatid

B. Spermatozoa

C. Spermatocyte

D. Primary oocyte

399. In spermatogenesis, each spermatogonium increases in size to form a __________?
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A. Spermatozoa

B. Spermatocyte

C. Primary oocyte

D. Spermatid

400. Male sterility is absence of_________?
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A. Sterile anther

B. Sterile pollen

C. All of these

D. Functional pollen