Reproducción Sexual: La Ovogénesis

Oogenesis Process Overview

The transcript discusses the process of oogenesis, which involves the formation of eggs in the ovaries during embryonic development.

Ovocytogenesis and Meiosis

• Ovogenesis is the formation of eggs in the ovaries during embryonic development.

• Diploid cells called oogonia undergo mitosis to generate primary oocytes, which start meiosis but pause at prophase I.

Puberty and Meiosis Resumption

• At birth, thousands of primary oocytes are in prophase I.

• Oogenesis resumes at puberty, where each primary oocyte completes meiosis I, resulting in two daughter cells with uneven cytoplasm distribution.

Meiosis II and Egg Maturation

• The secondary oocyte continues to meiosis II while the first polar body and secondary oocyte begin meiosis II.

• During each menstrual cycle, a secondary oocyte is released from the ovary. If fertilized, it completes meiosis II maturing into an egg.