Why is centriole absent in the ovum? What will happen if the centriole is present in ovum?
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Since both the ovum and the sperm have microtubular networks, a mechanism to prevent interference between the two-microtubule systems may be necessary. One such mechanism is that the recruitment of the maternal PCM proteins to the sperm centrioles takes place only after completion of female meiosis in C.
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Hence the two centrioles received by the secondary oocytes do not duplicate before meiosis II division probably because of the lack of S period. However, during that period, the unduplicated centriolar pair separates, each localizing to the opposite poles of the meiosis II spindle.
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