Oogenesis

Question 1

Before birth female reproductive stem cells produce

Answer 1

Primary 0ocytes by mitosis

Question 2

Primary oocytes proceed as far as —– until the individual reaches puberty

Answer 2

Prophase of meiosis 1

Question 3

The ovaries have 2 million primordial follicles at birth, each containing

Answer 3

A primary oocyte

Question 4

By puberty the number of primordial follicles has dropped to

Answer 4

400,000

The rest of the primordial follicles degenerate in the process called atresia

Question 5

One of the two ways that the ovaries differ during meiosis

Answer 5

The cytoplasm of the primary oocytes is unevenly distributed during the two meiotic division.

1 secondary oocyte contains most of the original cytoplasm, and two or three polar bodies, are nonfunctional cells that later disintegrate.

Question 6

The second way that ovaries differ during meiosis

Answer 6

The ovary releases a secondary oocyte rather than a mature ovum.

The secondary oocyte is suspended in metaphase of meiosis two.

Meiosis will not be completed until fertilization occurs.