Process Of Meiosis Essay Research Paper Meiosis

Process Of Meiosis Essay, Research Paper

Meiosis is the reproduction of sex or germ cells in which there are two divisions required to complete the process. They are called meiosis I and meiosis II. In meiosis I, members of homologous pairs of chromosomes divide into two complete sets. There are four stages: prophase I, metaphase I, anaphase I, and telophase I.. -Prophase I is the first phase in meiosis I. At this point, the cell prepares itself for division. -In metaphase I, the centromere of each chromosome attaches to the spindle. -In anaphase I, the chromosome number is reduced by half. -Telophase I consists of changes that return the cell to an interphase-like condition.

Meiosis II is a continuance of meiosis I, necessary for division to occur. This process includes: prophase II, metaphase II, anaphase II, and telophase II. -During prophase II the cells are haploid. -In metaphase II the chromosomes attach by their centromeres to the spindle at the equatorial plane of the cell. -In anaphase II the centromere of each chromosome divides and chromatids (now daughter chromosomes) move to the poles. -In telophase II the cell returns to a non-dividing condition. The nuclear membrane forms. Cells mature into gametes and the process is completed.