Pollen grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?

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Solution

The correct option is C 14
Since pollen grain are produced by meiosis in diploid pollen mother cells; pollens of a plant with 2n=28 will have n=14 chromosomes. Callus is mass of undifferentiated cells that are produced by mitotic division in the isolated plant cell; here the pollens. Hence, cell division in pollens (n=14) will produce callus with cell carrying 14 chromosomes. Correct answer is C.

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