Meiosis I and II

Although meiosis is a continuous process, we can study it more easily by dividing it into stages just as we did for mitosis. Indeed, meiosis and mitosis are similar, and their corresponding stages of prophase, metaphase, anaphase, and telophase have much in common. However, meiosis is longer than mitosis because meiosis involves two nuclear divisions instead of one. These two divisions are called Meiosis I and Meiosis II. The chromosome number is reduced (reductional division) during Meiosis I, and chromatids comprising each chromosome are separated in Meiosis II. Each division involves the events of prophase, metaphase, anaphase, and telophase.

Meiosis I and II.

Meiosis animation

Time-lapse microscopy of a meiosis overlaid with animation graphics. Microscopy by Jeremy Pickett-Heaps, animation by Drew Berry.

Advanced video overview of meiosis


Sources

  1. Meiosis stages. Ali Zifan, CC BY-SA 4.0 , via Wikimedia Commons Adapted from Meiosis stages, licensed under CC BY-SA.