PRINCIPLES OF BIOLOGY TEXT & CODE
16th Edition
ISBN: 9781269502528
Author: Pearson
Publisher: PEARSON
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Chapter 13, Problem 13.3CR
Summary Introduction
To explain: The reason why synapsis and crossing over cannot occur in prophase II.
Introduction: Meiosis is a process that involves two cell divisions—meiosis I and meiosis II, resulting in four daughter cells that are haploid. At prophase I, the homologous chromosomes pair with each other, and the process is known as synapsis. At the end of meiosis I, the two homologs separate into two daughter cells. The sister chromatids separate to form four haploid daughter cells in meiosis II.
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Chapter 13 Solutions
PRINCIPLES OF BIOLOGY TEXT & CODE
Ch. 13.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 13.1 - How does an asexually reproducing eukaryotic...Ch. 13.1 - WHATIF? A horticulturalist breeds orchids, trying...Ch. 13.2 - MAKE CONNECTIONS In Figure 13.4. how many DNA...Ch. 13.2 - VISUAL SKILLS In The karyotype shown in Figuro...Ch. 13.2 - WHAT IF? A certain eukaryote lives as a...Ch. 13.3 - MAKE CONNECTIONS Comparc tho chromosomes in a...Ch. 13.3 - WHAT IF? After the synaptonemal complex...Ch. 13.4 - What is the original source of Variation among the...Ch. 13.4 - The diploid number for fruit flies is 8, and the...
Ch. 13.4 - Prob. 3CCCh. 13 - Explain why human offifuing resemble their parents...Ch. 13 - Compare the life cycles of animals and plants,...Ch. 13 - Prob. 13.3CRCh. 13 - Prob. 13.4CRCh. 13 - A human cell containing 22 autosomes.and a Y...Ch. 13 - The two homologs of a pair move toward opposite...Ch. 13 - Meiosis II is similar to mitosis in that (A)...Ch. 13 - Prob. 4TYUCh. 13 - If we continue to follow the cell lineage from...Ch. 13 - DRAW IT The diagram shows a cell in meiosis. (a)...Ch. 13 - Explain how you can tell that the cell in question...Ch. 13 - EVOLUTION CONNECTION Many species can reproduce...Ch. 13 - SCIENTIFIC INQUIRY The diagram in quest ion 6...Ch. 13 - Prob. 10TYUCh. 13 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- Mitosis DrawingIn this assignment you will track and draw the chromosomes of a diploid organism through all the stages of mitosis. Make sure to draw the alleles for genes A and B on the chromatids in every stage. For mitosis, remember that many events are going on in the cell that are relevant besides just the movement of chromosomes, so please fill in the cell with pertinent structures such as centrioles and spindles.arrow_forwardAnimal and plant cell prophase similarity? Animal and plant cell Metaphase similarity? Animal and plant cell Anaphase similarity? Animal and plant cell Telophase similarity? 1. Explain why we used these particular cells to map the phases of mitosis (Whitefish blastula and Onion Root Tip). Why do these cells best demonstrate the phases of mitosis?arrow_forwardYou normally have 46 chromosomes in each of your somatic cells. How many bivalents are present at metaphase 1?arrow_forward
- A cell from a human female has just undergone mitosis. For unknown reasons, the centromere of chromosome 7 failed to divide. Describe the chromosomal contents of the daughter cells.arrow_forwardIf the M checkpoint is not cleared, what stage of mitosis will be blocked? prophase prometaphase metaphase anaphasearrow_forwardFigure 6.4 Which of the following is the correct order of events in mitosis? a. Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the initotic spindle. The nucleus re-forms and the cell divides. The sister chromatids separate. b. The kinetochore becomes attached to the mitotic spindle. The sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus re-forms and the cell divides. c. The kinetochore becomes attached to metaphase plate. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus re-forms and the cell divides. d. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. The kinetochore breaks apart and the sister chromatids separate. The nucleus re-forms and the cell divides.arrow_forward
- VISUALIZE Sketch a roughly cuboidal cell preparing to divide. Indicate the orientation of the preprophase band and the site where the new cell walls of the daughter cells will form.arrow_forwardBiologists have long been interested in the effects of radiation on cells. In one experiment, researchers examined the effect of radium on mitosis of chick embryo cells growing in culture. A population of experimental cells was examined under the microscope for the number of cells in telophase (as a measure of mitosis occurring) before, during, and after exposure to radium. The results are shown in the Figure. What is the effect of radium exposure on mitosis? Source: R. G. Canti and M. Donaldson. 1926. The effect of radium on mitosis in vitro. Proceedings of the Royal Society of London, Series B, Containing Papers of a Biological Character 100:413419.arrow_forwardDiploid somatic cells of elephants have 56 chromosomes. If nondisjunction of one of a male elephant’s chromosomes occurs in meiosis II, at the end of meiosis the four resulting sperm are expected to have the chromosome complement:arrow_forward
- 1. Which among the lettered cells in Fig 2 are at prophase stage? 2. Chromosomes are generally indistinct at interphase. Does this mean that they are newly formed for each cell division, explain your answer?arrow_forwardA somatic cell has 46 chromosomes aligned at metaphase. How many chromosomes are present at anaphase, immediately after the centromeres have split?arrow_forwardCohesin complexes hold chromatids together until theenzyme___________ cleaves the cohesin at anaphase.arrow_forward
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