Plant Breeding multiple choice questions
Ques. Plant breeding is
(a) An art
(b) A science
(c) both of these
(d) none of these
Ques. The product of hybridization is known as
(a) Clone
(b) Homozygous
(c) Hybrid
(d) Heterozygous
Ques. Mutations are caused due to
(a) Radioactive mutagens
(b) Chemical mutagens
(c) Radiation mutagens
(d) Change in base sequence
Ques. Crosses between, the plants of the same variety are called
(a) Interspecific
(b) Intervarietal
(c) Intravarietal
(d) Intergeneric
Ques. What are micro–mutations?
(a) Union of chromosomes
(b) Reduction of chromosomes
(c) Changes in genes
(d) Polyploidy
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Ques. Which is the oldest breeding method?
(a) Hybridization
(b) Selection
(c) Mutation breeding
(d) Introduction
Ques. Aims of plant breeding are to produce
(a) Disease-free varieties
(b) High yielding varieties
(c) Early maturing varieties
(d) All of these
Ques. Dwarf wheats were developed by
(a) Vavilov
(b) Borlaug
(c) Swaminathan
(d) Darwin
Ques. Technique employed in plant hybridization
(a) Emasculation
(b) Bagging
(c) Crossing
(d) All the these
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Ques. Who used X-rays for the production of mutations?
(a) Muller
(b) Leeuwenhoek
(c) Recawsky
(d) Hooker
Ques. A plant breeder wants to develop a disease resistant variety, what he should do first
(a) Hybridization
(b) Selection
(c) Production of crop
(d) Mutation
Ques. The origin of sunflower is believed to be in
(a) India
(b) Mexico
(c) Brazil
(d) USA
Ques. The process of removing stamens from the flower bud during hybridization is called
(a) Crossing
(b) Selfing
(c) Emasculation
(d) Caping
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Ques. Which of the following is most effective chemical mutagen?
(a) Methane
(b) Guanine
(c) Carbon tetrasulphide
(d) Caffeine
Ques. Maize evolved in
(a) USA
(b) Brazil
(c) Mexico and Central America
(d) Australia
Ques. Removal of anthers from flower buds is called
(a) Bagging
(b) Hybridization
(c) Emasculation
(d) Heterosis
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Ques. Emasculation is a part of
(a) Clonal selection
(b) Mass selection
(c) Hybridization
(d) Pure line selection
Ques. Which of the following is not used for crop improvement?
(a) Inbreeding
(b) Introduction
(c) Hybridization
(d) Mutations
Ques. What is a clone?
(a) A heterozygote produced by sexual means
(b) A homozygote produced by asexual means
(c) A heterozygote produced by asexual means
(d) A homozygote produced by sexual means
Ques. Process of hybridization is difficult because of
(a) Susceptibility to mutations
(b) Incompatibility and sterility
(c) Selection of suitable parents and hybrids
(d) All the above
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Ques. Heterosis means
(a) Hybrid vigour
(b) Hybrids are weak
(c) Hybrids are weak as well as vigorous
(d) Hybrids are neither weak nor vigorous
Ques. Plants can be disease resistant by
(a) Breeding with their wild relatives
(b) Colchicine treatment
(c) Hormone treatment
(d) Heat treatment
Ques. Potato and tomato are native of
(a) Canada
(b) North America
(c) China
(d) South America
Ques. The latest trend in plant disease control is
(a) Chemical control
(b) Biological control
(c) Use of fertilizers
(d) Use of disease resistant varieties
Ques. Modern plant breeding started in
(a) 1850
(b) 1880
(c) 1900
(d) 1930
Ques. Plant breeding is a technique of improving
(a) Agricultural crops
(b) Fodder crops
(c) Fruit varieties
(d) All of these
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Answer key