agriculture MCQs – Page 63

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

1241. The experimental design which controls fertility variation in two directions in known as_________________?
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A. AD

B. SPD

C. LSD

D. RBD

1242. Diocious plant is____________________?
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A. All the above

B. Hemp

C. Datepalm

D. Papaya

1243. Nutritional quality breeding deals with genetic improvement in__________________?
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A. All the above

B. Vitamin

C. Oil

D. Protein

1244. haploids are better for mutation studies because in them all the mutations whether recessive or dominant are expressed as_______________?
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A. There is only one alleles of each gene present in each cell

B. There are two alleles of each gene in each cell

C. Non3e4 of the above

D. There are many alleles of each gene in each call

1245. 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. 2:01

B. 1:02

C. 1:1

D. 3:01

1246. Soybean contains___________________?
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A. Typsin inhibitor

B. Goiterogens

C. Both A & B

D. Neither

1247. Haploid plants have been produced by another culture in tomato by_________________?
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A. Greshof and Doy (1972)

B. Singh (1960)

C. Tyagi and Prasad (1965)

D. Mehta and Upadhya (1960)

1248. Cytoplasm fills of the cavity of a cell when if is young. But in nature cells, the cytoplasm________________?
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A. Disintegrates partially

B. Contracts

C. Disappears completely

D. Becomes vacuolated
1249. Genetic correlation between two variables may be due to___________________?
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A. Peliotropy

B. Dominance

C. Gene interaction

D. Selection differential

1250. Among the following the test cross is_________________?
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A. TTxTT

B. TtxTt

C. Ttxtt

D. TTxTt

1251. 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. 8

C. 64

D. 120

1252. Bacteria, single celled animals and plants are grouped to gather as_______________________?
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A. Prokaryotes

B. Prototypal

C. Protozoa

D. Protista
1253. When a cell with 40 chromosomes undergoes meiosis each of the four resulting cells has_____________________?
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A. 40 chromosomes

B. 10 chromosomes

C. 20 chromosomes
1254. Genetic selection was proposed by_________________?
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A. East (1920)

B. Stadler (1944)

C. Richy (1927)

D. Hull (1945)

1255. In rice, brown plant hopper has no preference for___________________?
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A. Purple stigma

B. All the above

C. Red pericarp

D. Low aspergine

1256. The genetic constitution of an orgarusm is denoted by____________________?
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A. Genome

B. Phenotype

C. Allele

D. Genotype
1257. Mating system in which each female gamete () with every male gamete is known as____________________?
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A. Genetic disassortative mating

B. None of the above

C. Genetic assortative mating

D. Random mating
1258. Pedigree selection is used in____________________?
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A. Self pollinated plants

B. For crosses at intervener level

C. Cross pollinated plants

D. Plant difficult to hybridized

1259. Estimation of correlation form error variances and covariances is________________?
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A. Phenotypic correlation

B. Simple correlation

C. Environmental correlation

D. Genotypic correlation
1260. Polyploidy is most likely to result from ____________________?
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A. The failure of homologous chromosomes to separate during meiosis

B. The crossing over between non homologous chromosomes

C. Occurrence of karyokinesis

D. Occurrence of crossing over