Embryology: oogenesis: practice question

A Anatomy question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Anatomy · Embryology: oogenesis

Sample item

At the moment of ovulation, at which stage of meiosis is the human oocyte arrested?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Metaphase of meiosis II

The primary oocyte remains arrested in prophase I from fetal life until the LH surge, when it completes meiosis I and begins meiosis II. It then arrests at metaphase II, and meiosis II is completed only if fertilisation occurs.

Option by option

  • A. Metaphase of meiosis II (correct)

    Correct. The secondary oocyte is arrested at metaphase II until a sperm penetrates.

  • B. Prophase of meiosis I

    Prophase I arrest applies to the primary oocyte before the LH surge.

  • C. Anaphase of meiosis II

    Anaphase II occurs only after fertilisation triggers resumption of meiosis.

  • D. Telophase of meiosis I

    Telophase I is a brief transitional stage during which the first polar body is extruded.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Anatomy question

What is the answer to this Anatomy question?

The best answer is A, Metaphase of meiosis II. The primary oocyte remains arrested in prophase I from fetal life until the LH surge, when it completes meiosis I and begins meiosis II.

Why is "Prophase of meiosis I" not the answer?

Prophase I arrest applies to the primary oocyte before the LH surge.

Why is "Anaphase of meiosis II" not the answer?

Anaphase II occurs only after fertilisation triggers resumption of meiosis.

Why is "Telophase of meiosis I" not the answer?

Telophase I is a brief transitional stage during which the first polar body is extruded.

What concept does this question test?

It tests Embryology: oogenesis in Anatomy. It then arrests at metaphase II, and meiosis II is completed only if fertilisation occurs.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Embryology: oogenesis?

Learn every nerve by its route, its muscles and what a lesion looks like at the bedside. That one habit answers a large share of questions. Then use the flashcards and the other Anatomy questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.