Biology Reproduction MDCAT 2015
PMDC Verified Question 73 of 81
The oocyte released during ovulation is in:
A
Anaphase I
B
Metaphase I
C
Prophase I
D
Metaphase II
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Metaphase II
Concept:

Oogenesis in human females features strict cell cycle arrests at specific meiotic stages.

Solution:

  • A primary oocyte completes Meiosis I just before ovulation to become a secondary oocyte.


  • The secondary oocyte immediately begins Meiosis II but is arrested at Metaphase II.


  • It is precisely in this arrested Metaphase II stage that the ovum is released from the ovary during ovulation.


  • Meiosis II will only resume and complete if fertilization by a sperm occurs.


Why other options are incorrect:

Primary oocytes are arrested in Prophase I from birth until puberty. Anaphase I and Metaphase I are brief transitional phases occurring just prior to ovulation.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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