Question Detail
Question
In what stage of meiosis are primary oocytes arrested during oogenesis? a. metaphase II b. prophase I c. anaphase I d. metaphase I
Correct Answer
Option B is the correct answer.
Detailed Explanation
Primary oocytes begin meiosis I in fetal life but then arrest in prophase I (specifically at the diplotene stage). This arrest can last for many years, until the oocyte is stimulated to resume development and complete meiosis I just before ovulation.
Hint
They are paused at the very first stage of meiosis, and have been since before birth.