Johannsen proposed Pureline concept in 1903 working with princes variety of:
A) Ragi
B) Sorghum
C) Bajra
D) Rajma
The concept of boom and bust cycle was proposed by:
A) Palmer
B) Johannsen
C) Vilmorin
D) Pristely
Recombinant inbred lines developed by:
A) Single seed descent method
B) Back cross method
C) Recurrent selection
D) Pedigree selection
Near isogenic lines developed by:
A) Single seed descent method
B) Back cross method
C) Recurrent selection
D) Pedigree selection
Atlas 66 is a high protein variety of:
A) Maize
B) Chickpea
C) Wheat
D) Rice
Chromosome doubling action of colchicine is described by:
A) Blakeslee and Nebel
B) Benjamin Franklin
C) P.S. Pelletier
D) None of the above
Chemical formula of colchicine is:
A) C22H28O8N
B) C22H25O6N
C) C24H28O9N
D) None of the above
Nicotiana tabacum is a cross between:
A) N. sylvestris and N. tomentosa
B) N. sylvestris and N. rustica
C) Both A) and B)
D) None of the above
A condition in which both the alleles of a gene express themselves in the heterozygote is known as:
A) Codominance
B) Overdominance
C) Incomplete dominance
D) None of the above
Test cross ratio for supplementary gene action is:
A) 1:1:1:1
B) 2:1:1
C) 1:1:2
D) 1:2:1
Plasma genes segregate during which of the following?
A) Anaphase I
B) Anaphase II
C) Mitotic anaphase
D) Both A) and C)
Variegation may be produced by which of the following?
A) Nuclear genes
B) Plasma genes
C) Environmental factors
D) All of the above
Presence of DNA in mitochondria was first reported by:
A) Sanger and coworkers
B) Plaut and coworkers
C) Nass and coworkers
D) Lewis and coworkers
Which of the following is not true about mutation?
A) Generally, they are recessive and harmful
B) They are recurrent and random
C) Generally, they are reverse
D) All of the above
Crop improvement can utilize which of the following mutation?
A) Vital
B) Lethal
C) Sub vital
D) Sub lethal
The first gamma garden was built in:
A) Austria
B) USA
C) Japan
D) China
The primary effect of radiation is:
A) Excitation
B) Chromosome damage
C) Ionization
D) Free radical formation
Which of the following is a non-ionizing radiation?
A) Beta rays
B) Alpha rays
C) UV rays
D) All of the above
A cell without cell wall is known as:
A) Protoplasm
B) Protoplast
C) Cytoplast
D) Cytoplasm
The target insect pests for Cry1AC are:
A) Tobacco budworm
B) Cotton bollworm
C) Pink bollworm
D) All of the above

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