Essentials of Biology (5th International Edition)
Essentials of Biology (5th International Edition)
5th Edition
ISBN: 9781259660269
Author: Sylvia S. Mader, Dr., Michael Windelspecht
Publisher: Mcgraw-Hill
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Chapter 9, Problem 1BYB
Summary Introduction

To determine:

The reasons meiosis sometimes is referred to as reduction division.

Introduction:

Cell division is a process through which cell is divided and make new cells. The process is classified into two types, they are mitosis and meiosis. Mitosis is also known as vegetative division, in which daughter cells is identical to the parent cell and as well as to each other. Meiosis is also known as reproductive division, in which the daughter cells are not identical to the parent cell in their genetic constitution.

Expert Solution & Answer
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Explanation of Solution

Meiosis is a type of cell division that results in genetic variation in next generation. 4 daughter cells having half the number of chromosome from a single parent cell are formed. Meiosis occurs in reproductive cells to form egg and sperm in animals, and gametes and spores in plant.

Meiosis is termed as reduction division because it reduces the number of chromosome in the daughter cell. In this division, the diploid parent cells divide to form haploid cells. After chromosome duplication during cell cycle, the two meiotic divisions are as follows:

Meiosis-I, homologous chromosomes pair up and separate, resulting in two haploid with replicated chromosomes (reductional division).

Meiosis-II, sister chromatids separates (equational division).

The reductional division in Meiosis-I results in 4 daughter cells from a single parent cell. Each daughter cell receives half of the number of chromosomes present in the parent cell.

Conclusion

Meiosis is also known as reduction division as it results in four daughter cells with half the number of chromosomes from a single parent cell.

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The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY