GENETICS(LL)-W/CONNECT >CUSTOM<
GENETICS(LL)-W/CONNECT >CUSTOM<
6th Edition
ISBN: 9781260571561
Author: HARTWELL
Publisher: MCG CUSTOM
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Chapter 12, Problem 30P
Summary Introduction

To determine:

The type of cell division that is represented in the figure and the relationship between the parts of figure.

Introduction:

Meiosis, also known as the reductional division, is the second type of cell division that takes place in eukaryotes. The cell division is marked by a decrease in the chromosome number to half. This type of cell division allows the recombination of the genes on the chromosome to produce a zygote. The two diploid cells undergo division to produce four haploid daughter cells.

Summary Introduction

To determine:

The difference between cohesion of centromeres and cohesion of arms.

Introduction:

The chromosomes are condensed structures that are formed during the early phases of cell division from the loose network of chromatin thread and then regain their original structure after being divided into daughter cells.

Summary Introduction

To determine:

The mechanism that keeps the chromosomes together during metaphase.

Introduction:

The human consists of 23 pairs of chromosomes, condensed form of chromatids which divide during cell division into daughter cells. The human has 22 autosomes and one pair of sex chromosomes. The sex chromosomes determine the sex in an individual based on the type of sex chromosomes that are present in the fusing gametes.

Summary Introduction

To determine:

The role of shugoshin and the enzyme it inhibits.

Introduction:

The chromosome from chromatids are formed through the process of supercoiling. The chromatin fibres are condensed into thick structures called the chromosomes. This chromosome in bacteria is circular whereas in eukaryotes it is linear.

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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)   Data Table 1Stage    Totals    PercentInterphase        Mitosis:        Prophase        Metaphase        Anaphase        Telophase        Cytokinesis        Totals    100    100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
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Chapter 12 Solutions

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