Second maturation division of ova in Ascaris occurs

As the ova migrate from the proliferation to maturation zone.

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After fertilization.

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After deposition of sperms in vagina.

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None of the above.

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Solution

The correct option is D After fertilization.
Spermatozoa are amoeboid, while the ova are elliptical. Ova at this stage are actually secondary oocytes, having resulted from oogonia by a single maturation division. Fertilization is affected by the entry of the sperm into ova. After fertilization, ova undergo second maturation division.
Thus, the correct answer is option B.

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