Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 2, Problem 21PDQ
Summary Introduction
To review:
The differences and relation between chromatin fibers and mitotic chromosome.
Introduction:
The genomic DNA (deoxyribonucleic acid) present in the nucleus of the cell is very large and this is a need to be packed in the form of condensed small fiber so that it can adjust into the cell. The packaging of the DNA is done by histone proteins and this protein-DNA complex is known as chromatin. These fibers are present like beads on string structure in the cell. Chromosomes are the condensed form of the chromatin carrying genetic information as genes.
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Within which phase of mitosis does chromatin condense into small manageable chromosomal units?
a) In which stage of mitosis do chromosomes condense?
(b) If a eukaryotic organism has a total of 34 chromosomes, how many pairs will the chromosomes be arranged in?
(c) Define homologous chromosomes.
Why is the chromosome’s DNA tightly packed for mitosis and cytokinesis?
Chapter 2 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 - CASE STUDY | Timing is everything A man in his...Ch. 2 -
HOW DO WE KNOW?
1. In this chapter, we focused...Ch. 2 -
2. Review the Chapter Concepts list on page 12....Ch. 2 - What role do the following cellular components...Ch. 2 -
4. Discuss the concepts of homologous...Ch. 2 - If two chromosomes of a species are the same...Ch. 2 - Describe the events that characterize each stage...Ch. 2 - How are chromosomes named on the basis of their...
Ch. 2 - Prob. 8PDQCh. 2 -
9. Describe the phases of the cell cycle and the...Ch. 2 - Define and discuss these terms: (a) synapsis, (b)...Ch. 2 - Prob. 11PDQCh. 2 - Prob. 12PDQCh. 2 - Contrast spermatogenesis and oogenesis. What is...Ch. 2 -
14. Explain why meiosis leads to significant...Ch. 2 -
15. A diploid cell contains three pairs of...Ch. 2 - Prob. 16PDQCh. 2 -
17. During oogenesis in an animal species with a...Ch. 2 - Prob. 18PDQCh. 2 -
19. During the first meiotic prophase, (a) when...Ch. 2 -
20. Describe the role of meiosis in the life...Ch. 2 - Prob. 21PDQCh. 2 - Prob. 22PDQCh. 2 - Prob. 23PDQCh. 2 -
24. If one follows 50 primary oocytes in an...Ch. 2 -
25. The nuclear DNA content of a single sperm...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 -
For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...Ch. 2 - For Problems 26–31, consider a diploid cell that...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the major difference between a metaphase chromosome and a telophase chromosome in mitosis?arrow_forwardThe same chromosome can look very different depending on when in meiosis it is observed. Explain fully why this is so and also why the chromosome is less condensed during some parts of the cell cycle? How many DNA molecules does each chromosome contain at the beginning of Prophase I? Use the following terms in your explanation: chromatin, histone, chromatid, centromere.arrow_forwardHuman somatic cells have 46 chromosomes. Are the cells different in any way from the parent cell and what is chromosome count of each of those cells once they have finished mitosis?arrow_forward
- A somatic cell has 46 chromosomes aligned at metaphase. How many chromosomes are present at anaphase, immediately after the centromeres have split?arrow_forwardWhat materials provide the substance of a densely staining chromosomes present during mitosis?arrow_forwardWhat is the function of mitotic spindle?arrow_forward
- Human cells normally have 46 chromosomes. For each of the following stages, state the number of chromosomes and the number of DNA molecules found in these chromosomes that are present in a human cell. a) Metaphase of mitosis Metaphase I of meiosis c) Telophase of mitosis (after cytokinesis)arrow_forwardWhat is the time span of each stage of mitosis? Arrange the stages from shortest to longest.arrow_forwardDuring mitosis, a single cell divides to produce two daughter cells. What must happen in the original cell so that each of the daughter cells has a complete set of chromosomes?arrow_forward
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