When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often

superior to both its parents. This phenomenon is called

1. transformation

2. splicing

3. metamorphosis

4. heterosis

Subtopic:  Plant Breeding & Its Steps (OLD NCERT) |
 63%
NEET - 2011
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Breeding of crops with high levels of minerals, vitamins and proteins is called

1. somatic hybridisation

2. biofortification

3. biomagnification

4. micropropogation

Subtopic:  Plant Breeding for Quality (OLD NCERT) |
 90%
From NCERT
NEET - 2010
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Somaclones are obtained by

1. tissue culture

2. plant breeding

3. irradiation

4. genetic engineering

Subtopic:  Plant Tissue Culture |
 90%
From NCERT
NEET - 2009
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Polyethylene glycol method is used for

1. gene transfer without a vector

2. biodiesel production

3. seedless fruit production

4. energy production from sewage

Subtopic:  Transforming Plant & Animal Cell |
 72%
NEET - 2009
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Transgenic plants are

1. produced by a somatic embryo in artificial medium

2. generated by introducing foreign DNA in to a cell and regenerating a plant from that

cell

3. produced after protoplast fusion in artificial medium

4. grown in artificial medium after hybridisation in the field

Subtopic:  Intro to Agri Applications |
 79%
NEET - 2009
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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 upto eight identical twins can be produced

Subtopic:  Animal Husbandry (OLD NCERT) |
 79%
From NCERT
NEET - 2007
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In maize, hybrid vigour is exploited by:

1. bombarding the seeds with DNA

2. crossing of two inbred parental lines

3. harvesting seeds from the most productive plants

4. inducing mutations

Subtopic:  Impact: Green Revolution (OLD NCERT) |
NEET - 2007
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Which one of the following is a viral disease of poultry ?

1. Salmonellosis

2. Coryza

3. New castle disease

4. Pasteurellosis

Subtopic:  Animal Husbandry (OLD NCERT) |
 60%
NEET - 2007
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Golden rice is a promising transgenic crop. When released for cultivation, it will help in:

1. alleviation of vitamin- A deficiency

2. pest resistance

3. herbicide tolerance

4. producing a petrol-like fuel from rice

Subtopic:  Other GM Crops |
 96%
From NCERT
NEET - 2006
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Crop plants grown in monoculture are:

1. low in yield

2. free from intraspecific competition

3. characterised by poor root system

4. highly prone to pests

Subtopic:  Insect & Pest Resistance (OLD NCERT) |
NEET - 2006
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