Read the given statements and select the correct option.
Statement 1: In a Graafian follicle, the primary oocyte and the follicle cells may be regarded sibling cells.
Statement 2: Both arise from the same parent cell, the oogonium, by mitotic divisions.

The correct option is A Both statements 1 and 2 are correct.
The primary follicles and the Graafian follicle are all derivatives of the gamete mother cells or oogonia that are a result of mitotic divisions. The follicular cells develop when the oocytes are surrounded by a layer of granulosa cells. The Graafian follicle comprises of both the primary oocyte and the surrounding follicle and can be referred to as sibling cells as they both arise from the oogonia.

So, the correct option is 'Both statements 1 and 2 are correct.'.