plant breeding and genetics MCQs – Page 18

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

plant breeding and genetics Mcqs
341. Which one of the following is not a cereal crop?
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A. Maize

B. Wheat

C. Paddy

D. Sorghum
342. If the leaf cells have eight chromosomes it is mostly likely that__________________?
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A. Zygote will have 16 chromosomes

B. Gametes will have 8 chromosomes

C. Gametes will have 4 chromosomes

D. Zygote will have 4 chromosomes

343. Year 1900 was significant for geneticists due to__________________?
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A. Discovery of gene

B. heredity theory

C. Principles of linkage

D. Rediscovery of Mendels
344. The change in chromosome number which involves the entire set of genome is known as______________?
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A. Anenploidy

B. Euploidy

C. Trisomy

D. all the above

345. If diploid chromo me number in flowering plant is 8 then 4 chromosomes will be present in_________________?
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A. Synergids

B. Endosperm cell

C. Cotyledonary cell

D. Leaf cells

346. Many groups of insects have developed resistance to DDT and other insecticides as a result of____________________?
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A. Gene mutation

B. Segregation

C. Polyploidy

D. Crossing over

347. A cross of hybrid with one of its recessive parent is termed____________________?
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A. Test cross

B. Trihybrid

C. Hybridization

D. Backcross

348. If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?
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A. 1:1

B. 3:01

C. 2:01

D. 1:02

349. Suppose that out of 1000 offsprings in the generation of a dithered cross, 748 are tall and hairy, 6 are tall and smooth, 4 are short and hairy and 242 are short and smooth. what is the explanation for this kind of ratio ?
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A. Linkage and crossing over

B. Presence of lethal genes

C. Sex-linkage

D. Presence of multiple alleles

350. The carrier of genetic information is __________________?
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A. Carbohydrates

B. Ribosome

C. Protein

D. Nucleic acid
351. Headquarter of union for the protection of new plant varieties is in__________________?
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A. Den nark

B. Thailand

C. USA

D. Switzerland
352. Cells intercommunicates with neighbouring cells by_________________?
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A. Nessels

B. Plasmalema

C. Trachieds

D. Plasmedesmata
353. Gametophytic self incompatibility was first reported in___________________?
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A. Lena sativa

B. Scale cereals

C. Nicotine sandarac

D. Set aria sphacelata

354. Concept of gene for gene hypothesis was developed in____________________?
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A. Oat

B. Tomato

C. Gram

D. Linseed
355. Ribosomes are the centers of_____________________?
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A. Starch synthesis

B. Anaerobic respiration

C. Protein synthesis

D. Fat synthesis

356. Abnormal cell with random number of chromosomes is__________________?
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A. Heterckaryotic

B. Polyploidy

C. Haploid

D. Annapolis
357. Hereditary variations in plants have been produced by the use of________________?
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A. Auxins

B. Gibberrellic acid

C. X-rays

D. DDT

358. After self pollination of red flowered plants out of 40 plants of progeny were white flowered. this indicates that the plants are__________________?
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A. Homozygous

B. Homogenous

C. Heterogeneous

D. Heterozygous
359. In the F2 generation, genotypic and phenotypic ratios are identical in cases of___________________?
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A. Incomplete dominance

B. None of the above

C. Mendelian dihybrids

D. Mendel lan monohybrids

360. A cross of hybrid with one of its parents is termed as____________________?
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A. Test cross

B. Backcross

C. Biohybrid

D. Hybridization