Question

Which diagram correctly displays the order of events during egg formation?

Answer 1

Answer:

Explanation:

The right sequence is

primary oocyte---meiosis I---- secondary oocyte---meiosis II---Ovum

Answer 2

Answer:

The correct answer will be option- primary oocyte- meiosis I- secondary oocyte-meosis II-ovum

Explanation:

Oogenesis is the process of formation of mature ovum from the primary oocyte.  Oogenesis begins during the embryonic stage when the oogonim divides by mitosis forming primary oocyte.

The primary oocyte then divides by meiosis and undergoes meiosis I and form a larger cell body called secondary oocyte and the smaller polar body. The secondary oocyte is then halted at meiosis I which undergo meiosis II at puberty during ovulatory phase.

This secondary oocyte halts at metaphase II until fertilization and when fertilization takes place completes the meiosis II and forms a complete egg cell.

Thus, primary oocyte- meiosis I- secondary oocyte-meiosis II-ovum  is the correct answer