plant breeding and genetics MCQs – Page 8

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

plant breeding and genetics Mcqs

141. The term homeostasis was coined by_____________________?
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A. Freeman (1971)

B. Jinks (1968)

C. Warner (1952)

D. Lemer (1954)

142. The term heterosis was coined by____________________?
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A. Shull (1914)

B. Hull (1945)

C. Bruce (1910)

D. East (1908)

143. Reciprocal recurrent selection was proposed by___________________?
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A. Constock et al (1949)

B. Hays and limner (1950)

C. Allard (1955)

D. Hull (1935)

144. The concept of diallel selective mating was developed by____________________?
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A. brim (1966)

B. Russel (1978)

C. Jensen (1970)

D. Jensen (1952)

145. In populations genotypic and phenotypic ratios are identical in cases of___________________?
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A. Mendelian dihybrid

B. None of the above

C. Incomplete dominance

D. Mendel lan monohybrid

146. When red tall plant is crossed with dwarf white plant all the plants of F, are found to be tall red. which of the following ratio will be available when a test cross is made_________________?
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A. 1:02:03

B. 3:01

C. 1:1:1:1

D. 1:02:01

147. How many type of DNA are_________________?
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A. 4

B. 2

C. 3

D. 6

148. The functional unit of mutation is___________________?
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A. Gaston

B. Recon

C. Gene

D. Mouton

149. Sugar present in DNA is_______________?
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A. Heptose

B. Pentose

C. Hexose

D. Triose

150. The maximum magnification possible within electron microscope is____________________?
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A. 2000 times

B. 200,000 times

C. 400,000 times

D. 4000 times

151. Gynandromorphy in Drosophila because of_________________?
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A. Kappa particles

B. inheritance

C. Gain of Y-chromosome

D. Loss of X-chromosome

152. Seed germination in typhoin walermelon can successfully be obtained by____________________?
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A. Seed cot removal

B. Seed risking

C. All the above

D. Scarification

153. Mutation breeding is mostly used in____________________?
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A. Self pollinated crops

B. Often cross pollinated crops

C. Cross pollinated crops

D. Vegetative propagated crops

154. In case of incomplete dominance in the f2 generation_______________________?
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A. Ratio of phenotypes is 3:1

B. None of the above

C. Phenotypic ratio corresponds to the genotypic ratio

D. Ratio of genotypes is 3:1

155. If the cell of an organism (heterozygous) for two pairs of genes represented by Aa, Bb, undergoes meiosis then the possible genotype of gametes are________________?
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A. Ab, ab

B. AB, ab

C. AB, Ab, aB, ab

D. Data insufficient

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

B. Allele

C. Phenotype

D. Genotype

157. When a wheat variety with red kernels (homozygous for two non allelic and independent dominant genes) is crossed with white kenneled wheat (homozygous for two recessive non allelic independent genes), the phenotypic ratio in the F2 generation would be________________?
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A. 9:3:3:1

B. 1:4:6:4:1

C. 9:07

D. 9:9:9:3:3:3:1

158. RNA contains_____________________?
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A. 4 carbon sugars

B. 6 carbon sugars

C. 5 carbon sugars

D. 3 carbon sugars

159. Maturation of stamens and pistils at different times in the same flower is called___________________?
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A. Heterospory

B. Dichotamy

C. Heterostyle

D. Dichogamy

160. The protein synthesizing system is associated with_____________________?
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A. Microtubules

B. Episodes

C. Mitochondria

D. Ribosomes

Showing 141 to 160 of 408 mcqs