agriculture MCQs – Page 61

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 Review each marked answer and report any item that may be outdated or unclear.

1201. In primary trisomic the extra chromosome is__________________?
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A. None of the above

B. Isochromosome

C. Normal chromosome

D. Traits located chromosome

1202. The small unit of DNA capable of undergoing crossing over and recommbination is________________?
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A. Cistron

B. Recon

C. Muton

D. Complan

1203. The term cell was introduced in 1665 by__________________?
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A. Hook

B. Schumann

C. Maligned

D. Schneider
1204. RNA contains__________________?
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A. Argenine

B. Cystine

C. Uracil

D. Thymine

1205. In half diallel, total crosses among parents are equal to___________________?
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A. P (P-1)/2

B. P (P-1)

C. P (P+1)/2

D. P2

1206. The maximum magnification possible within electron microscope is____________________?
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A. 4000 times

B. 400,000 times

C. 200,000 times

D. 2000 times

1207. The term poly genes was coined by___________________?
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A. Hazel (1943)

B. Yates (1947)

C. Mather (1943)

D. Griffing (1956)

1208. The term useful heterosis was first used by__________________?
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A. Richey (1914)

B. Hull (1950)

C. Meredith and Bridge (1972)

D. Jenkins (1935)

1209. Triticuin aestivuin is_________________?
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A. Oetaploid

B. Hexaploid

C. Triploid

D. Teuaplioid

1210. Who coined the term genetic flexibility and phenotypic flexibility___________________?
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A. Hardy (1908)

B. Salisbury (1940)

C. Thoday (1953)

D. Muller (1950)

1211. Self incompatibility in which the genes express in the style is known as__________________?
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A. Styler SL

B. Polyallelic SL

C. Diallelic SL

D. Ovarian SL

1212. A mutation is a change in_________________?
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A. DNA

B. Chromosome number

C. Chromosome structure

D. RNA

1213. Anthesis starts in wheat at__________________?
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A. 1.15 pm

B. 7.00 am

C. 10.00 am

D. 5.20 pm

1214. Reproduction from an unfertilized egg or reproduction without fertilization may be defined as___________________?
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A. Calistoga

B. Clone

C. Chimera

D. Inbreeding

1215. Mutant allele that has little or no effect on the expression of a tart is known as_____________________?
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A. Atavism

B. Auxotroph

C. Armor

D. Axoneme

1216. The concept of diallel selective mating was developed by____________________?
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A. Russel (1978)

B. Jensen (1970)

C. Jensen (1952)

D. brim (1966)

1217. Neurotoxin is found in___________________?
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A. Lucem

B. Pearl millet

C. Berseem

D. Sorghum
1218. In crop improvement programmed haploids are of great importance because they__________________?
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A. Give homozygous lines following diplodization

B. Require only about half the amount of chemical fertilizers compared to diploids

C. Grow better under adverse conditions

D. Are useful in studies on meiosis

1219. Various crosses made using a common tester are__________________?
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A. Double cross

B. Biparental cross

C. Test cross

D. Top crosses

1220. Gynandromorphy in Drosophila because of_________________?
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A. Loss of X-chromosome

B. Kappa particles

C. inheritance

D. Gain of Y-chromosome