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If a diploid cell is treated with colchi...

If a diploid cell is treated with colchicine, then it becomes

A

Monoploid

B

Tetraploid

C

Diploid

D

Triploid

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The correct Answer is:
B
Cholchicum autumnale provides an alkaloid called colchicine which is used in plant breeding for doubling the chromosome number. Treatment with 0.1% colchine inhibits spindle formation so that chromatids fail to separate during anaphase.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-CELL CYCLE AND CELL DIVISION-EXERCISE
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  2. Which of the following occurs more than one and less than five in a ch...

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  3. If a diploid cell is treated with colchicine, then it becomes

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  4. During karyokinesis, the spindle fibres get attached to condensing chr...

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  5. Crossing over in diploid organism is responsible for

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  6. A bacterium divides every 35 minutes. If a culture containing 10^(5) c...

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  7. During cell division in apical meristem nuclear membrane reappears in

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  8. How many mitotic divisions are needed for a single cell to make 128cel...

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  9. Which of the folliwng structure will not be common to mitotic cell of ...

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  10. The exchange of genetic material between chromatids of paired homologo...

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  11. Lampbrush chromosomes are visible

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  12. The point at which the polytene chromosomes appeart to be attached tog...

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  13. Meiosis is evolutionary significant because it results in

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  14. Best stage to observe shape, size and number of chromosome is

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  15. In salivary gland chromosomes/polytene chromosomes, pairing is

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  16. Meiosis II performs

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  17. Balbiani rings (puffs ) are sites of

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  18. Number of chromatids per chromosome at metaphase is

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  19. In meiosis, the daughter cells differ from parent cell as well as amon...

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  20. Mitotic anaphase differs from metaphase in possessing

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