Which of the following are the inhibitors to cell wall synthesis
A. Penicillin
B. Oxamycin and Ristocatin
C. Vanomycin
D. All of the above
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The study of frequencies of mating population is known as
A. Population genetics
B. Behavioural genetics
C. Quantitative genetics
D. None of the above
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The direct and the immediate visible effect of pollen grains on the seed coat colour during the formation of seeds is termed as
A. Xenia
B. Penetrance
C. Impact
D. None of the above
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The unblended expression of two different alleles for a trait in the phenotype of heterozygous individual is called as
A. Incomplete dominance
B. Complete dominance
C. Over dominance
D. Co-dominance
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The minimum number of primary sample to be taken from seed lot for having lot size 50 - 500 kg is
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Seed replacement rate of pulses is
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Multiple alleles are present
A. At the same locus in one type of chromosome
B. At different chromosomes
C. At different loci in the same chromosome
D. At same chromosome
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With the reference to pure line selection in self-pollinated crops, consider the following statements
1. Pure line selection is essentially based on the genotype of the plant.
2. It is effective only for heritable differences.
3. It is ineffective in creating new variations.
Which of the statements given above are correct?
A. 1 and 2
B. 2 and 3
C. 1 and 3
D. All of these
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Photosystem-II takes place in
A. Stroma
B. Grana
C. Enter chloroplast
D. Outer chloroplast envelope
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The modern method of seed storage is
A. Cold storage
B. Ultra dry
C. Heat dry
D. Go down
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Commercial hybrid seed production in cotton in our country has been possible due to which one of the following reasons
A. Availability of male sterile lines
B. Pressure of self-incompatibility system
C. Large-scale hand emasculation and pollination
D. Entomophily of flowers
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Consider the following crops
1. Bajra
2. Cotton
3. Maize
4. Rice
Which one of the following is the correct sequence of the above crops according to the period of the development of first hybrid varieties in India?
A. 2, 3, 1 and 4
B. 1, 3, 2 and 4
C. 3, 1, 2 and 4
D. 3, 2, 1 and 4
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The actual pressure with which water enters into the cell is called?
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Who gave the concept of circular chromosome in E. coli
A. Cairns
B. Meselson
C. Watson
D. Mendel
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Random assortment of genes will occur if the genes are located on
A. Same chromosome
B. Different chromosomes
C. Sex chromosome
D. Autosome
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Replacement of purine with another purine base is known as
A. Transversion
B. Transduction
C. Translocation
D. Transition
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Tag colour of Foundation seed is
A. Green
B. Amber blue
C. White
D. Golden yellow
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A mutant gene in Hordeum vulgare produces albino seedlings at temperature below 8°C. But when the seedling carrying this gene are grown at 19°C or above, they develop into normal green seedlings. The characters whose development depends upon a specific environment are known as
A. Discrete characters
B. Quantitative characters
C. Threshold characters
D. Pleioitropy
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Pusa Sugandha-5 is new variety of
A. Rice
B. Rose
C. Marigold
D. Gladiolus
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Asexual reproduction includes
A. Autogamy
B. Allogamy
C. Amphimixis
D. Apomixis
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