Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Textbook Question
Chapter 12.1, Problem 1CC
How many chromosomes are drawn in each part of Figure 12.5? (Ignore the micrograph in Step 2.)
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Figure 1 is a photography obtained after spreading the replicating Escherichia coli chromosome
and its observation by transmission electron microscopy. An interpretation scheme of the
observed structure is shown in the upper right part of the photo.
Figure 1: Photography of a replicating
Escherichia coli chromosome observed
DA
by transmission electron microscopy.
2
to what do correspond respectively the grey, black and dotted lines?
Indicate below the name of the chromosomal regions that are squared and named
respectively A and B on Figure 1
Label a, b, c and d
locate the telophase (use arrow to draw on pic please) then describe the appearance of the DNA, spindle fibers and location of the chromosomes
Chapter 12 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 12.1 - How many chromosomes are drawn in each part of...Ch. 12.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 12.2 - How many chromosomes are shown in the illustration...Ch. 12.2 - Compare cytokinesis in animal cells and plant...Ch. 12.2 - During which stages of the cell cycle does a...Ch. 12.2 - Compare the roles of tubulin and actin during...Ch. 12.2 - A kinetochore has been compared to a coupling...Ch. 12.2 - MAKE CONNECTIONS What other functions do actin...Ch. 12.3 - In Figure 12.14, why do the nuclei resulting from...Ch. 12.3 - How does MPF allow a cell to pass the G2 phase...
Ch. 12.3 - MAKE CONNECTIONS Explain how receptor tyrosine...Ch. 12 - Differentiate between these terms: chromosome,...Ch. 12 - In which of the three phases of interphase and the...Ch. 12 - Explain the significance of the G1, G2, and M...Ch. 12 - Through a microscope, you can see a cell plate...Ch. 12 - Vinblastine is a standard chemotherapeutic drug...Ch. 12 - One difference between cancer cells and normal...Ch. 12 - The decline of MPF activity at the end of mitosis...Ch. 12 - In the cells of some organisms, mitosis occurs...Ch. 12 - Which of the following does not occur during...Ch. 12 - Cell A has half as much DNA as cells B, C, and D...Ch. 12 - The drug cytochalasin B blocks the function of...Ch. 12 - VISUAL SKILLS The light micrograph shows dividing...Ch. 12 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 12 - EVOLUTION CONNECTION The result of mitosis is that...Ch. 12 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 12 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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- Figure 1 is a photography obtained after spreading the replicating Escherichia coli chromosome and its observation by transmission electron microscopy. An interpretation scheme of the observed structure is shown in the upper right part of the photo. Figure 1: Photography of a replicating Escherichia coli chromosome observed by transmission electron microscopy. what is occurring at the positions C indicated by black arrows? what is the name of the main actor located at positions C?arrow_forwardIndicate below the name of the chromosomal regions that are squared and named respectively A and B on Figure 1arrow_forwardFigure 17.8 Do you think Dolly was a Finn-Dorset or a Scottish Blackface sheep?arrow_forward
- what is the full name of the TISSUSE TYPE at the end of the arrow for letter F? F1) Does this look like any other lettered structure on this photomicrograph? If yes, which one and how are they similar.arrow_forwardlocate the interphase (use arrow please) then describe the appearance of the DNA, spindle fibers and location of the chromosomesarrow_forwardNow that you have counted the non-recombinant and recombinant asci we want to determine the recombination frequency between the tan gene and the centromere. To calculate the recombination frequency we need an accurate count of the number of non-recombinant recombinant individuals. In the asci the individuals are the ascospores. and 1118 WWW 4 non- recombinant ascospores 4 non- recombinant ascospores 1838 W M M M 500 2 non- recombinant ascospores 2 recombinant ascospores 2 recombinant ascospores 2 non- recombinant ascospores Figure 1.6. The number of ascospores in non-recombinant and recombinant asci. In the non-recombinant asci all 8 ascospores are non-recombinant (see Figure 1.6 above). In the non-recombinant asci 4 of the ascospores are recombinant and 4 of the ascospores are non-recombinant (see Figure 1.6 above). To determine how many recombinant and non-recombinant ascospores where in the two pictures above we need to do the math below. You need to use the total number of…arrow_forward
- You prepare a slide with a thin slice of an onion root tip. You see the following view in a light microscope. Identify the stage of mitosis for each of the outlined cells, a–darrow_forwardWhich meiotic division(s) reduce(s) chromosome number (i.e., meiosis I, meiosis II, or both)? Explain your answer. Edit View Insert Format: Toold Tablarrow_forwardAs shown gives the number of chromosomes in a haploid set of chromosomes. What is the lowest number in the table? What is the highest number? Most cells in plants are diploid, having two sets of chromosomes,so the number per nucleus should be doubled. How many chromosomes are present in each diploid potato nucleus? If a potato plant has 1 million cells, each with one diploid nucleus, how many chromosomes are present in the entire plant?arrow_forward
- Mitosis produces 2 daughter cells that are identical to the starting cell. Explain how meíosis is different using this diagram to help you. 1) How many cells are created through meiosis? 2) Describe the chromosomes in each gamete at the end of meiosis? Are the set of chromosomes in a gamete identical to the starting cell like they are in mitosis? Are there the same number of chromosomes in each gamete as the starting cell? Starting cell's chromosomes: 1А, 1B, 2A, 2B Interphase After the S phase of interphase: 4 pairs of sister chromatids 1A 1A 1B 1B 2A 2A 2B 2B Meiosis has 2 rounds of cell division 1A, 1A, 1B, 1B, 2A 2B 2A 2B tv MacBook Air DII DD 80 888 F9 F10 F6 F7 F8 F4 F3 * #3 2$ % & 8 9 3 4 E T. Y F G J K * CO Rarrow_forwardOn Figure 1, what is occurring at the positions C indicated by black arrows?arrow_forwardThe microscope image above shows the human chromosomes from a white blood cell. To create the image, researchers put cells in culture under conditions that encourage the cells to divide. They bathed the cells in a hypotonic (low salt) solution, which caused the cells to swell until their plasma membrane burst open. They "squashed" the chromosomes to spread them out, and stained them with a dye to make them visible under the microscope. Human chromosomes are numbered from longest (1) to shortest (22) plus the sex chromosomes X and Y. In the image chromosome 1 is about 7 micrometers. Answer the following questions. 1) What word(s) in the description above indicates that the chromosomes are not from a cell undergoing meiosis? 2) Based on the size, shape and appearance of the chromosomes in the image, in what cell cycle stage was the cell that the chromosomes came from? How can you tell? 3) Does the image suggest that centromere sequences are always located in the middle of a…arrow_forward
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