Difference Between Metaphase 1 and 2

Metaphase 1 vs 2
 

Meiosis is the process that converts a diploid cell to a haploid gamete, and it is important to increase the genetic diversity of the offspring. Meiosis is vital in sexual reproduction and it has two successive nuclear divisions called meiosis I and meiosis II. Each nuclear division can be subdivided into Prophase, Metaphase, Anaphase and Telophase. Metaphase is the stage of cell division in which the chromosomes arrange along the Metaphase plate. Metaphase I can be found in meiosis I while Metaphase II can be found in meiosis II.

Metaphase I

The Metaphase stage found in meiosis I is called the Metaphase I. In here, the pairs of chromosomes began to arrange on the Metaphase plate and then they bind to the meiotic spindle. At this moment, the centrioles can be seen at the opposite poles of the dividing cell. The pairs of chromosomes get attached to the spindle fibers from each pole, at the opposite sides.

Metaphase II

The Metaphase II is found in meiosis II, and it is very similar to the Metaphase found in mitosis I. In this step too chromosomes get arranged on the Metaphase plate and are attached to the completed spindle.

What is the difference between Metaphase 1 and Metaphase 2?

• In Metaphase I, the ‘pairs of chromosomes’ are arranged on the Metaphase plate while, in the Metaphase II, the ‘chromosomes’ are arranged on the metaphase plate.

• In Metaphase I, the spindle fibers get attached to two centromeres of each homologous chromosome. But, in Metaphase II, the spindle fibers get attached to one centromere from both sides. 

• The plane of Metaphase plate in Metaphase I is perpendicular to the plane of Metaphase plate in Metaphase II.