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If you are provided with root tips of onion in your class and are asked to count the chromosomes which of the following stages can you most conveniently look into?

(a) Metaphase

(b) Telophase

(c) Anaphase

(d) Prophase

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Correct option (a) Metaphase

Explanation :

At metaphase, the chromosomes are clearly visible as composed of two closely associated halves (chromatids) and the chromosomes have undergone maximum contraction so, these can be counted conveniently. In metaphase chromosome align in the equator of the cell before being separated into each of the two daughter celIs.

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