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

 65%
From NCERT
NEET - 2019
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Pebrine is a disease of:

1. Fish

2. Honey bee

3. Silkworm

4. Lac insect

 62%
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Match the following columns and choose the correct option. 

1. A-5 B-4 C-1 D-2

2. A-5 B-4 C-1 D-3

3. A-4 B-2 C-3 D-1

4. A-1 B-2 C-4 D-5

 60%
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The world's highly prized wool-yielding 'Pashmina' breed is:

1. Sheep

2. Goat

3. Goat-sheep cross

4. Kashmiri sheep-Afghan sheep cross

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In maize, hybrid vigour is exploited by:

1. bombarding the protoplast with DNA

2. crossing of two inbred parental lines

3. harvesting seeds from the most productive plants

4. inducing mutations

 52%
AIPMT - 2006
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Crop plants grown in monoculture are:

1. low in yield

2. free from intraspecific competition

3. characterized by a poor root system

4. highly prone to pests

AIPMT - 2006
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Which one of the following is being utilized as a source of bio-diesel in the Indian countryside?

1. Euphorbia

2. Beetroot

3. Sugarcane

4. Pongamia

AIPMT - 2007
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Haploids are more suitable for mutation studies than the diploids. This is because:
1. haploids are reproductively more stable than diploids
2. mutagens penetrate in haploids more effectively than
in diploids
3. haploids are more abundant in nature than diploids
4. all mutations, whether dominant or recessive are
expressed in haploids

Subtopic:  Plant Tissue Culture |
 69%
AIPMT - 2008
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Bacterial leaf blight of rice is caused by a species of:

1. Xanthomonas

2. Pseudomonas

3. Alternaria

4. Erwinia

 50%
AIPMT - 2008
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Polyethene glycol method is used for:

1. gene transfer without a vector

2. biodiesel production

3. seedless fruit production

4. energy production from sewage

Subtopic:  Plant Tissue Culture |
 59%
AIPMT - 2009
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