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Free download in PDF Plant Breeding Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams of Botany, Life-Science, Biotechnology etc. These short solved questions or quizzes are provided by Gkseries.
(1)
Breeding for disease resistance requires
[A]
a good source of resistance
[B]
Planned hybridisation
[C]
Diseases test
[D]
all of these
(2)
Polyploidy is induced through
[A]
Irradiation
[B]
Mutagenic chemicals
[C]
Ethylene
[D]
Colchicine
(3)
Pure line breed refers to
[A]
Heterozygosity Only
[B]
Homozygosity Only
[C]
Homozygosity And Self Assortment
[D]
Heterozygosity And Linkage
Answer: Homozygosity Only
(4)
Bagging is done to
[A]
Avoid cross pollination
[B]
Avoid self pollination
[C]
Achieve desired pollination
[D]
Prevent contamination from foreign pollen
Answer: Prevent contamination from foreign pollen
(5)
A technique of micropropagation is
[A]
Multiple root production
[B]
Somatic embryogenesis
[C]
Growth of micro organisms on culture medium
[D]
Multiple shoot production and embryo rescue
Answer: Somatic embryogenesis
(6)
A mating is expected to produce 50% heterozygotes and homozygotes is
[A]
BB X Bb
[B]
BB x Bb
[C]
both a and b
[D]
bb xbb
(7)
The codons which collectively code for the same amino acid
[A]
Synonymous codons or Degenerate codons
[B]
Initiation codons
[C]
Termination codons
[D]
None Of The Above
Answer: Synonymous codons or Degenerate codons
(8)
How many triplet codons can be made from the four nucleotides A, U, G na d C containing one or more uracils?
[A]
27/64
[B]
17/64
[C]
37/64
[D]
47/64
(9)
Given the antisense DNA codon 3'TAC5', the anticodon that pairs with corresponding mRNA codon could be
[A]
3'CAT5'
[B]
5'AUG3'
[C]
3'UAC5'
[D]
None of the Above
(10)
The highest number in Ophioglossum reticulatum
[A]
2n=1260
[B]
2n=1206
[C]
2n=1026
[D]
2n=1620
(11)
What is LD 50?
[A]
Mutagen kills 50% treated materials
[B]
Mutagen kills 50% un-treated materials
[C]
Lose of 50% chemicals
[D]
Low dose of semi mutagen
Answer: Mutagen kills 50% treated materials
(12)
The method of section of plants from population by their Phenotype
[A]
Mass Selection
[B]
Pureline Section
[C]
Clonal section
[D]
Both a and b
(13)
The process of transfer of hereditary character from one generation to another is known as...........?
[A]
Genes
[B]
Mutation
[C]
Variation
[D]
Genetics
(14)
Which term of genetics represents the potential ability of a plant cell to grow into a complete plant?
[A]
Pluripotency
[B]
Totipotency
[C]
Cloning
[D]
Variation
(15)
What do you mean by law of dominance?
[A]
When offspring shows the characters of generation
[B]
When Offspring of cross breed parent only show dominant characters in F1 generation
[C]
When offspring of cross breed parent only show dominant characters in F2 generation
[D]
In F2 generation both the character which is governed by gene are separated
Answer: When Offspring of cross breed parent only show dominant characters in F1 generation
(16)
Which of the following process is an exception of Mendel Law?
[A]
Mutation
[B]
Variation
[C]
Linkage
[D]
None of the above
(17)
Which plant Gregor Mendel had cross breed for his experiment?
[A]
Onion plant
[B]
Carrot plant
[C]
Pea plant
[D]
Lily plant
(18)
A sudden change in the gene which is heritable from one generation to other is known as?
[A]
Variation
[B]
Cloning
[C]
Totipotency
[D]
Mutation
(19)
Name the chromosome found in the cells which are responsible for characters other than sex chromosomes?
[A]
Autosomes
[B]
Genome
[C]
Mitochondrial chromosome
[D]
Y chromosome
(20)
Who is known as father of genetics?
[A]
Gregor Mendel
[B]
Augustinian friar
[C]
Norman Borlaug
[D]
M.S Swaminathan
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