BIO 1406/07 BK/LAB/CODE PREPACK
BIO 1406/07 BK/LAB/CODE PREPACK
12th Edition
ISBN: 9781265538590
Author: Raven
Publisher: MCG
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Chapter 11, Problem 1IQ
Summary Introduction

To determine: The proper chromosomal constitution of a cell.

Introduction: Chromosome is a part of DNA that contains all genetic information. The chromosome is consisting of a packaging protein that binds with condense DNA molecules to prevent from the unmanageable problem.

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Cell division is an important event in which the division of parental cells leads to the two or more daughter cells. The cell division is taken place by mitosis and meiosis. Mitosis involves a single nuclear division after DNA replication. In mitosis, two daughter cell is produced, and a particular cell contains the original number of chromosome.

Whereas, meiosis involves two nuclear division without DNA replication and produces four daughter cells. Every daughter cells contain half of the original number of chromosomes because crossing over takes place in the prophase I of meiosis.

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Exercise Observe the diagram below and answer the following questions: Image Source: Wikimedia Commons 18₂1)-(²) (Cr)-(1 1. Which process is represented in these diagrams? Mitosis or meiosis? Explain your answer. 2. How many chromosomes did the cell start with? 3. How many chromosomes are present at the end of division I? 4. How many chromosomes are present in each cell at the end of division II? Homologous Chromosomes 5. Explain how meiosis results in UNIQUE cells. 6. Is this cell division occurring in a plant cell or an animal cell? What is the main difference between the two divisions?
Need help with question: -If a nucleus has 12 chromosomes during interphase,how many chromosomes does it have during metaphase? How many are there after mitosis has finished? - the contrast of the cleavage furrow with the cell plate. Offer details at the cellular level.
MITOSIS AND MEIOSIS COMPARISON TABLE Basis of Comparison 1. Type of Cell where the Mitosis Meiosis process occurs | 2. Number of cell divisions 3. Number of chromosomes in parent cell and daughter cell 4. Needed Checkpoints 5. Stages/ Phases 6. Final product 7. Example
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