Vybrid is:
A) A progeny obtained through cell culture
B) A progeny obtained from interspecific hybridization
C) A progeny obtained from cross between two facultative apomicts
D) None of the above
Genetic male sterility is maintained by:
A) Anther culture
B) Sib mating
C) Selfing
D) All of the above
In barnase/barstar system of genetically engineered genetic male sterility, barnase gene is taken from:
A) Blue green algae
B) Aspergillus
C) Bacillus amyloliquefaciens
D) Bacillus thuringiensis
Selection within pure lines is:
A) Much more effective
B) Not effective
C) Beneficial for crop improvement
D) None of the above
Loss in vigour or fertility as a result of inbreeding is known as:
A) Inbreeding coefficient
B) Inbreeding depression
C) Genetic erosion
D) All of the above
A condition in which F1 hybrid express increase in vegetative growth but not in yield and adaptation is known as:
A) Heterobeltiosis
B) Luxuriance
C) Standard heterosis
D) All of the above
Luxuriance is also known as:
A) Standard heterosis
B) Economic heterosis
C) Heterobeltiosis
D) Pseudo heterosis
When selection is done for only one extreme of a particular character, it is known as:
A) Mass selection
B) Directional selection
C) Pureline selection
D) Disruptive selection
The proportion of different types of allele in a random mating population is known as:
A) Gametic frequency
B) Genotypic frequency
C) Gene frequency
D) Both A) and C)
According to Hardy Weinberg law, in random mating populations gene and genotypic frequencies remain constant if there is:
A) No selection
B) No migration
C) No mutation and random drift
D) All of the above
Genetic assortative mating is also known as:
A) Inbreeding
B) Outbreeding
C) Advance breeding
D) None of the above
Genetic assortative mating increases:
A) Homozygosity
B) Prepotency
C) Both A) and B)
D) Heterozygosity
Maize, Sorghum and Bajra showed:
A) High inbreeding depression
B) Moderate inbreeding depression
C) Low inbreeding depression
D) Lack of inbreeding depression
Dominance of linked gene hypothesis was proposed by:
A) Jinks
B) Shull
C) Collins
D) Jones
The genes that increase the spontaneous mutation rate of other genes of the genome are known as:
A) Mutable genes
B) Mutator genes
C) Both A) and B)
D) Antimutator genes
Which of the following are densely ionizing radiations?
A) Fast neutrons
B) Thermal neutrons
C) Alpha rays
D) All of the above
Which of the following is a deamination agent?
A) Nitrous acid
B) EMS
C) Acriflavin
D) Both A) and C)
Genetic make up of a genotype is known as:
A) Genetic value
B) Breeding value
C) Genotype
D) Phenotype
Cross pollinated population is:
A) Homozygous and homogenous
B) Homozygous and heterogenous
C) Heterozygous and homogenous
D) Heterozygous and heterogenous
Vilmorin practiced individual plant selection in……..for sugar content:
A) Maize
B) Sugarcane
C) Potato
D) Sugarbeet

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