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Root tips of allium cepa (otherwise known as the onion) are popularly used for cytological studies all over the world for the following reasons:

1) Roots are easy to grow from the base of the bulb kept over a water container.

2) Good quality, unsoiled root tips are easy to obtain.

3) Root tips have very rapid rate of mitosis.

4) The cells are very responsive to staining techniques.

5) The chromosomes are large and fewer in number. (Only 16 in a cell have the diploid condition. 8 is the haploid number.)

6) Fixing, staining, and ultimately making the slides permanent is easy in this material.

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9y ago
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14y ago

They are cheaper and more apparent

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13y ago

yea ehhhh

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Q: Why are the onion root tip and the whitefish blastula useful tissue for the study of cell division?
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