Question

The graafian follicle contains

• A. Primary oocyte
• B. Secondary oocyte
• C. Ovum
• D. Both A and B.

Answer 1

The correct option is B

Secondary oocyte

The correct option is B.

Explanation of the correct option:

1. The mature ovarian follicle is known as the graafian follicle.
2. It develops from a tertiary follicle.
3. It contains secondary oocytes arrested in metaphase 2.

Explanation of the incorrect options:

Option A:

1. Many primary oocytes are present and the time of birth and are arrested in the prophase stage of meiotic division one.
2. These cells do not divide until the organism reaches sexual maturity.
3. When an organism becomes sexually mature the FSH and LH hormones start to stimulate the development of these follicles.
4. These get converted into the early primary follicle and then into the primary follicle later into the secondary follicle in which the first meiotic division is completed

Option C:

1. The primary oocyte gets converted into the early primary follicle and then into the primary follicle later into the secondary follicle in which the first meiotic division is completed.
2. The secondary follicle then gets converted into a graafian follicle that contains the secondary oocyte.
3. Ovum is the female gamete.
4. It is expelled from the graafian follicle.

Option D:

1. The primary oocyte gets converted into the early primary follicle and then into the primary follicle later into the secondary follicle in which the first meiotic division is completed
2. The secondary follicle then gets converted into graafian follicle that contains the secondary oocyte.

Final answer: The graafian follicle contains a secondary oocyte.