The root cell of wheat plant has 42 chromosomes. What would be the number of chromosomes in the synergid cells?

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Solution

The correct option is C 21
The pollen tube ultimately enters an ovule through the micropyle and penetrates one of the sterile cells on either side of the egg ( synergids). These synergids begin to degenerate immediately after pollination.
Synergids are haploid in nature. Thus, if root cell has 2n = 42, synergids will have n = 21.

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