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.Management Sciences
Category: Plant Breeding and Genetics
Occurrence of cells in diploid organisms containing multiples of the 2n genomes is known as____________________?
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A. Allopolyploid
B. Amphidiploids
C. End polyploidy
D. Aneupoidy
Concept of combining ability as measure of gene action was first proposed by___________________?
A. Sprague and Tatum (1942)
B. Cavalli (1952)
C. Mather (1956)
D. Wright (1951)
Srought is indicated by__________________?
A. Increase in proline level
B. Increase in ethylene level
C. leaf rolling
D. all the above
Top cross was first suggested by__________________?
A. Simmonds (1979)
B. East (1908)
C. Davenport (1908)
D. Davis (1927)
Cytoplasmic sterility is govemed by________________________?
A. Nuclear genes
B. Plasma genes
C. Monoalleleic genes
D. None of the above
Difference between mean phenotypic value of the progeny of selected plants and the parental population is known as__________________?
A. Genetic gain
B. Genetic advance
C. Heritability
D. Coheritability
The value of regression and correlation is the same when the correlation between two variables is________________?
A. Imperfect
B. Perfect
C. Positive
D. Negative
In wheat, example of durable insect resistance includes resistance to___________________?
A. Green bugs
B. Stem saw fly
C. Hessian fly
D. All the above
In a population gene frequencies remain constant when there is_________________?
A. Iubreeding
B. Out breeding
C. Random mating
D. Selective mating
Plastids bring about___________________?
A. Secretion
B. Respiration
C. Excretion
D. Conversion of light energy into chemical energy
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