Question

What is the stage of the cell cycle at which primary oocytes are arrested?

• A. Prophase I
• B. Metaphase I
• C. Prophase II
• D. Metaphase II

Answer 1

Answer:

A. Prophase I

Oogonia are formed during fetal development. Soon they start undergoing meiosis but are arrested at Prophase I awaiting further cues of division. Oogonia at this stage are called primary oocytes.