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Biology
Strategies for Enhancement in Food Production
59 questions from 29 papers, each with its answer.
- 59 questions
- 29 papers
- 1.67% of Biology
Plant Breeding: Polyploidy
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If a diploid cell is treated with colchicine then it becomes : -Colchicine, an alkaloid from Colchicum autumnale, inhibits the formation of the spindle fibres during cell division.
The chromosomes duplicate and separate, but the cell does not divide, so the chromosome number of the cell is doubled.
A diploid (2n) cell thus becomes tetraploid (4n).
Colchicine is used by plant breeders to produce polyploid plants.
Plant Tissue Culture
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What is the reason of formation of embryoid from pollen grain in tissue culture mediumTotipotency is the ability of a single living plant cell to grow into a complete plant.
When pollen grains (or anthers) are cultured on a suitable medium, the haploid pollen cells divide and form embryo-like structures called embryoids, which can grow into haploid plants (Guha and Maheshwari, 1964).
This shows that even a pollen grain cell is totipotent.
So embryoids form from pollen grains because of cellular totipotency.
That is every question in Strategies for Enhancement in Food Production for this filter.
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