plant breeding and genetics MCQs – Page 11

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

plant breeding and genetics Mcqs
201. The digestive vacuole in the animal cell are____________________?
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A. Ribosomes

B. Dictysomes

C. Lysozymes

D. Lysosomes
202. One of the following is not a technique in hybridization_________________?
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A. Bagging

B. Inter over crossing

C. Inosculation

D. Intraspecific crossing

203. A cross of unlike organisms is termed as____________________?
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A. Hybrid

B. Backcross

C. Heterosis

D. None of the above

204. Under drought conditions, there is an increase in__________________?
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A. Abscisic acid

B. All the above

C. Pro line level

D. Ethylene level

205. The crossing of a yomozygous tall plant and a homozygous dwarf plant would yield plants in the ratio of_________________?
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A. All the heterozygous tall

B. 2 tall: 2 dwarf

C. One homozygous tall, one homozygous dwarf, two heterozygous tall

D. All homozygous dwarf

206. Norine 10 is the source of dwarfing gene in________________?
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A. Oat

B. Wheat

C. Barley

D. Rice

207. Continuous variation are attrions are attributed to____________________?
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A. Linkage

B. Polyploidy

C. Mutations

D. Crossingover
208. The smallest unit of recombination in the chromosome is called___________________?
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A. Recon

B. Citron

C. Chromosome

D. Gene

209. The recommended ratio of male the recommended of male rows to female rows in hybrid bajra production is_________________?
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A. 2 to 4

B. 3 to 6

C. 4 to 8

D. 1 to 2

210. Name chromosome was coined by ___________________?
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A. T. Boveri

B. Aluman

C. Walleye

D. Van Beneden

211. In primary trisomic the extra chromosome is__________________?
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A. Traits located chromosome

B. None of the above

C. Normal chromosome

D. Isochromosome

212. The significance of difference among several means is tested with the help of____________________?
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A. Z-test

B. x-test

C. t-test

D. F-test
213. The reason why mutations which are harmful do not eliminated from gene pool is that___________________?
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A. They have future survival value

B. Genetic drift occurs because of a small population in to offsprings

C. They are recessive and carried by heterozygous individuals

D. Making possible reproduction in all types of environments

214. When an albino plant of maize (female) is crossed with normal green plant (male) all plants in the progeny are albino because___________________?
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A. Green plastids of male parent become nitrated

B. Crossing over results in structural changes in green plastids

C. Plastids are inherited through maternal parents

D. Albinism is dominant over green characters

215. A normal plant suddenly started reproducing parthengentically. the number of chromosomes of the second generation compared to the parent plant will be____________________?
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A. Double

B. One fourth

C. Same

D. One half

216. Linkage of hereditary units was discounted by__________________?
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A. T.B. Morgan and G. Mendel

B. W.S. Sutton and K. R. Porter

C. C.B. Bridges and G.H. Shull

D. W. Batson and B.C Pun net
217. Polytene chromosomes were first observed by___________________?
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A. Allard (1910)

B. Baranetzky (1910)

C. Balbiani (1881)

D. Mendel (1810)

218. RNA contains__________________?
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A. Cystine

B. Argenine

C. Uracil

D. Thymine

219. As a general rule interbreeding is possible between______________________?
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A. Any two members of an order

B. Any two members of a Family

C. Any two members of a Species

D. Any two members of a Genus

220. How many times mitotic divisions must occur in a cell of the root tip to form 256 cels___________________?
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A. 32

B. 64

C. 120

D. 8