Chapter 10.1, Problem 6MI

Summary Introduction

To Analyze: Phase of meiosis I and meiosis II

Introduction: Meiosis is a specialized form of cell division in which number of chromosomes is reduced to half. The reduction in chromosomes number is achieved by one round of DNA replication being followed by two rounds of DNA replication. It is divided into two parts meiosis I and meiosis II.

Explanation of Solution

Meiosis I	Prophase I	Metaphase I	Anaphase I	Telophase I
Description	Nuclear envelope breaks down, crossing over occurs, and chromosomes condensed.	Homologous pairs move together along the metaphase plate.	Homologous chromosomes are separated and move to opposite poles.	The chromosomes arrive at the poles and Each daughter cell has half the number of chromosome.
Sketch
Meiosis II	Prophase II	Metaphase II	Anaphase II	Telophase II
Description	The centrosomes are duplicated during interkinesis move away from opposite poles and new spindles are formed.	The sister chromatids are condensed and aligned at the metaphase of the cell.	The chromatids are pulled apart and move opposite poles.	The chromatids are arrived at opposite poles and start to decondensed. Nuclear envelopes reform around the chromosomes
Sketch

Conclusion

Hence, in meiosis I, homologous chromosomes are separates and produced two haploids daughter cells. In meiosis II, sister chromatids are separated and produced four haploid daughter cells.