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Question

Root cells of wheat has 2n = 42 chromosomes. Which one of the following is the basic chromosome number of wheat?

A
42
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B
21
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C
7
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D
14
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Solution

The correct option is C 7
Common wheat is hexaploid. So the diploid chromosome number of 42 actually means six sets of basic chromosome number, i.e., each basic set is made up of 42 divided by 6 or 7 chromosomes.

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