plant breeding and genetics MCQs – Page 16

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

plant breeding and genetics Mcqs
301. The term useful heterosis was first used by__________________?
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A. Jenkins (1935)

B. Hull (1950)

C. Richey (1914)

D. Meredith and Bridge (1972)
302. The parry of Cauliflower which is eaten is__________________?
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A. Fruit

B. Flower

C. Bud

D. Inflorescence
303. A child is born with an extra chromosome in each of it cells, the reason is___________________?
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A. Non-disjunction

B. Hybridization

C. Segregation

D. Crossing over

304. Heterosis can be fully exploited in the form of_____________________?
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A. Synthetics

B. Composites

C. Hybrids

D. Multi lines

305. A mutant organism (bacterium) that will not grow on a minimal medium does so on the addition of some grown factor is known as __________________?
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A. Auxotroph

B. Autotrophy

C. Heterotroph

D. Axenema

306. In maize source of high lysine is___________________?
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A. Gang as

B. Opaque 2

C. Proline

D. African tall

307. Kinds of nitrogen containing bases fond in RNA are__________________?
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A. Four

B. Six

C. Eight

D. Two

308. Parthenogenesis is most commonly seen in___________________?
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A. Mango

B. Apple

C. Orange

D. Grape
309. Eugenics refers to__________________?
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A. Genetics of eukaryotes

B. Experimental alterations in the structure of the genes

C. Science concerned with improvement of heredity of human race

D. Science concerned with improvement of heredity of animals

310. Maximum vegetable crops belong to the family____________________?
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A. Cucurbitaceae

B. Cruciferae

C. Legumunaceae

D. Solanaceae

311. The offspring of a cross between twp individuals differing in at least one set of characters is called__________________?
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A. Hybrid

B. Mutant

C. Polyploidy

D. Variant

312. Which one is C4 crop plant_____________________?
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A. Sugarcane

B. all the above

C. Sorghum

D. Maize

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

B. Armor

C. Axoneme

D. Atavism

314. A gene which enhances the natural mutations rate of another gene in the same genome is kanown as___________________?
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A. Mutator gene

B. Mutable gene

C. Recepror gene

D. Articulator gene

315. Polyploidy is most likely to result from ____________________?
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A. Occurrence of karyokinesis

B. Occurrence of crossing over

C. The crossing over between non homologous chromosomes

D. The failure of homologous chromosomes to separate during meiosis
316. Apheliotropic gene is one which___________________?
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A. Affects more than one character

B. Affects only one character

C. Affects more than ten characters

D. Affects more than five characters

317. A mutation which kills 50% of the individual that carry the mutation is known as_________________?
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A. Sub lethal mutation

B. Sub-vital mutation

C. Vital mutation

D. Lethal mutation

318. Which of the following had great influence on Drawing during during formulation of his theory of natural selection_________________?
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A. Mathiss essay on population

B. De Vries theory of mutation

C. Mendess experiment on pea

D. Lamarks idea on inheritance of acquired characters

319. 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
320. Reciprocal recurrent selection is effective with___________________?
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A. Over dominance

B. Complete dominance

C. Incomplete

D. All the above