Question

During the process of oogenesis

• A. Primary oocytes produce sperm
• B. Primary oocytes produce eggs
• C. The egg implants in the uterus
• D. The egg is released from the ovary
• E. Starfish regenerate limbs

Answer 1

The correct option is B Primary oocytes produce eggs

The formation of ova in the ovary from primordial germinal cells is said to be oogenesis. It is completed in three steps:

(1) Multiplication phase: The germinal epithelium cells of the ovary multiply by mitotic divisions to form a small cluster of cells known as follicles. A single cell from the follicle differentiates and form oogonium.

(2) Growth phase: The oogonium grows in size and attains maturity and is called primary oocyte.

(3) Maturation phase: The primary oocyte undergoes the first meiotic division and produces a larger secondary oocyte and a small polar body. The secondary oocyte divides to form a mature ovum and a second polar body.

Thus option B is the correct answer.