In mung bean, resistance to yellow mosaic virus, and powdery mildew was brought about by:

1. Mutation breeding

2. Biofortification

3. Tissue culture

4. Hybridization and selection

Subtopic:  Breeding for Disease Resistance |
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Select the incorrect statement regarding inbreeding:

1. Inbreeding helps in elimination of deleterious alleles from the population

2. Inbreeding is necessary to evolve a pure-line in any animal

3. Continued inbreeding reduces fertility and leads to inbreeding depression.

4. Inbreeding depression cannot be overcome by out-crossing.

Subtopic:  Animal Husbandry |
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Select the incorrect statement:

1. Inbreeding helps in the accumulation of superior genes and the elimination of undesirable genes
2. Inbreeding increases homozygosity
3. Inbreeding is essential to evolve pure lines in any animal
4. Inbreeding selects harmful recessive genes that reduce fertility and productivity
Subtopic:  Animal Husbandry |
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In order to obtain virus-free plants through tissue culture the best method is :

1. protoplast culture

2. embryo rescue

3. anther culture

4. meristem culture

Subtopic:  Plant Tissue Culture |
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In cloning of cattle, a fertilized egg is taken out of the mother's womb and:

1. the egg is divided into 4 pairs of cells which are implanted into the womb of other cows

2. in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows

3. in the eight cell stage, the individual cells are separated under electrical field for further development in culture media

4. from this up to eight identical twins can be produced

Subtopic:  Animal Husbandry |
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Somaclones are obtained by

1. tissue culture

2. plant breeding

3. irradiation

4. genetic engineering

Subtopic:  Plant Tissue Culture |
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Breeding of crops with high levels of minerals, vitamins and proteins is called

1. somatic hybridization

2. biofortification

3. biomagnification

4. micropropagation

Subtopic:  Plant Breeding for Quality |
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‘Himgiri’ developed by hybridization and selection for disease resistance against rust pathogens is a variety of

1.  maize

2.  sugarcane

3.  wheat

4.  chilli

Subtopic:  Breeding for Disease Resistance |
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Mutations can be induced with

1.  IAA

2.  ethylene

3.  gamma radiations

4.  infrared radiations

Subtopic:  Breeding for Disease Resistance |
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A collection of plants and seeds having diverse alleles of all the genes of a crop is called

1.  germplasm

2.  gene library

3.  genome

4.  herbarium

Subtopic:  Plant Breeding & Its Steps |
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