Q. No.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
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 |
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
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
| 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 |
1. Xanthomonas
2. Pseudomonas
3. Alternaria
4. Erwinia
Polyethene glycol method is used for:
1. gene transfer without a vector
2. biodiesel production
3. seedless fruit production
4. energy production from sewage
While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant:
1. Bagging of female flower
2. Dusting of pollen on stigma
3. Emasculation
4. Collection of pollen
In virus-infected plants the meristematic tissue in both apical and axilary buds are free of virus because:
1. the dividing cells are virus resistant
2. meristems have anti viral compounds
3. the cell division of meristems are faster than the rate of viral multiplication
4. virus cannot multiply within meristem cell (s).
1. transformation
2. splicing
3. metamorphosis
4. heterosis
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