INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During meiosis, the egg is stuck in ____ until fertilization occurs
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Anaphase I
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Metaphase I
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Anaphase II
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Telophase I
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Metaphase II
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Explanation:
Detailed explanation-1: -Mammalian oocytes are stored in the ovary arrested at prophase I of meiosis.
Detailed explanation-2: -Oocytes from higher chordates, including man and nearly all mammals, arrest at metaphase of the second meiotic division before fertilization. This arrest is due to an activity that has been termed ‘Cytostatic Factor’.
Detailed explanation-3: -After ovulation the oocyte is arrested in metaphase of meiosis II until fertilization. At fertilization, the secondary oocyte completes meiosis II to form a mature oocyte (23, 1N) and a second polar body.
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