Question

Graafian follicles are formed from

• A. Stroma of ovaries
• B. Columnar epithelium of testes
• C. Germinal epithelium of ovaries
• D. Assembly of ribosomes in bacteria

Answer 1

The correct option is C Germinal epithelium of ovaries

During foetal development, few cells of germinal epithelium of ovary differentiate into large cells with a prominent nucleus and divide mitotically to produce undifferentiated egg mother cell/oogonia. Further, oogonia become larger and divide to produce a round mass of egg nest that has a cluster of diploid cells. One of these cells serves as a primary oocyte, while rest form follicle cells. In follicular prenatal phase, the primary oocyte starts first meiotic division but is transitionally suspended into prophase stage of meiosis I and is stored in the follicle. The primary oocyte and surrounding follicle cells form a primary follicle, which is differentiated into secondary and then Graafian follicle. Thus, germinal epithelium cells are the progenitor of the Graafian follicle.

So, the correct answer is option C.