Essential Cell Biology 5e
Essential Cell Biology 5e
5th Edition
ISBN: 9780393691108
Author: Bruce Alberts, Karen Hopkin, Alexander D Johnson, David Morgan, Martin Raff, Keith Roberts, Peter Wa
Publisher: W. W. Norton
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Chapter 18, Problem 22Q
Summary Introduction

To explain: The sister chromatids do not end up in the same daughter cell, rather they are split apart equally into two daughter cells.

Introduction: During the S phase of cell cycle, the DNA undergoes replication and two copies of DNA are produced, which are condensed to form sister chromatid structure bound to a centromere. The cell cycle process involves the cell division, M phase. The M phase has four stages: prophase, metaphase, anaphase, and telophase. In each of these phases, the chromosomes are aligned accordingly, so that each daughter cell receives only one copy of the chromosome each. In somatic cells, where mitosis takes place, the chromosomes are present in diploid number that is two copies of the same gene as alleles are present. The alleles can be homozygous or heterozygous.

Summary Introduction

To explain: The consequences if a mitotic error occurs where the sister chromatids end up in the same daughter cell.

Introduction: During the S phase of cell cycle, the DNA undergoes replication and two copies of DNA are produced, which are condensed to form sister chromatid structure bound to a centromere. The cell cycle process involves the cell division, M phase. The M phase has four stages: prophase, metaphase, anaphase, and telophase. In each of these phases, the chromosomes are aligned accordingly, so that each daughter cell receives only one copy of the chromosome each. In somatic cells, where mitosis takes place, the chromosomes are present in diploid number that is two copies of the same gene as alleles are present. The alleles can be homozygous or heterozygous.

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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY