1. Ten centromeres are observed in a prophase cell from a Sorghum bicolor plant. a. How many pairs of chromosomes does this plant contain? b. For each stage of mitosis, indicate the number of centromeres you would expect to find and the number of copies of chromosomes attached to each centromere. Stage of mitosis: Number of centromeres visible per cell Number of chromosomes copies attached to centromere Prophase Anaphase

1. Ten centromeres are observed in a prophase cell from a Sorghum bicolor plant. a. How many pairs of chromosomes does this plant contain? b. For each stage of mitosis, indicate the number of centromeres you would expect to find and the number of copies of chromosomes attached to each centromere. Stage of mitosis: Number of centromeres visible per cell Number of chromosomes copies attached to centromere Prophase Anaphase

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter10: Cell Reproduction

Section: Chapter Questions

Problem 1VCQ: Figure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line...

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Figure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate. The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.
Biologists 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.
Separation of the sister chromatids is a characteristic of which stage of mitosis? a. prometaphase b. metaphase c. anaphase d. telophase
1) What phase of mitosis is this? Answer: 2) What is the indicated structure 1? select one. a. chromosome b. chromosome with two sister chromatids c. centrioles/centrosome d. spindle fibres e. metaphase plate 3)If the diploid (2n) number of this cell is 8 how many chromosomes are present? 4) If the diploid (2n) number of this cell is 8 how many sister chromatids are present? 5) If the diploid (2n) number of this cell is 8 how many homologous pairs are present?
If a cell has five pairs of chromosomes, and if this cell undergoes cell division, the number of chromosomes found in anaphase I and anaphase II, along with the chromosome arrangement with respect to chromatids, are respectively. The statement given above is completed by the information in row and ii Rowi A. 10 chromosomes 10 chromosomes with single chromatid В. ii with linked sister chromatids 20 chromosomes 10 chromosomes with linked sister with single chromatids С. chromatid 10 chromosomes 20 chromosomes with single chromatid with single chromatid 10 chromosomes 10 chromosomes with linked sister with linked sister chromatids D. chromatids
The primary function of Asters in mitosis is Select one: O a. The production of microfilaments spindles to separate the two sister chromatids O b. The formation of microfilaments needed to hold chromosomes O C. The formation of microtubule spindles to separate the daughter chromosomes O d. The dissociation of the nuclear envelop O e. Formation of a cleavage furrow
1. Mitosis: a. Are the chromosomes at each pole during telophase identical to chromosomes in the original cell (prior to S phase of cell cycle)? b. Are the new daughter cells genetically identical to the original cell? c. Does crossing over occur in mitosis? Explain.
1. Draw Interphase and label cells in each stage of mitosis. 2. Draw prophase and label cells in each stage of mitosis. 3. Draw Metaphase and label cells in each stage of mitosis. 4. Draw Anaphase and label cells in each stage of mitosis 5. Draw Telophase and label cells in each stage of mitosis. 6. Draw Daughter Cells and label cells in each stage of mitosis
5.) Using Figure 4.4, identify the phase of mitosis that each of the following events occur in. migration of sister chromatids to the poles condensation of chromatin into chromosomes formation of a nuclear membrane
Imagine that a cell contains a temperature-sensitive mutation such that nuclear lamins cannot be phosphorylated at the restrictive temperature. Describe the phenotype of the mutant cells during mitosis at the restrictive temperature. O The mutant cells will not be able to decondense chromosomes and will be arrested in prophase O The mutant cells will not be able to assemble the mitotic spindle and will be arrested in metaphase O The mutant cells will not be able to disassemble the nuclear envelope and will be arrested in prophase The mutant cells will go through multiple mitotic cycles without cytokinesis and will become multi-nucleated The mutant cells will be unable to reassemble the nuclear envelope and will be arrested in telophase
D. centromere QUESTION 8 Match the stages of mitotic cell division to the descriptions of those stages. v chromosomes attach to spindle fibers across the middle of the cell chromosomes are not yet duplicated so chromosomes only look like a line, only one pair of centrioles in cell A. Telophase cell membrane is pinching in forming a peanut-shaped cell, daughter v chromosomes reach the poles and new nuclear membranes are forming around them B. Late Interphase C. Early Interphase the nuclear membrane is breaking down, chromosomes are |condensing, centrioles are building microtubule "highways" (spindle fibers) D. Metaphase E. Anaphase chromosomes are duplicated so chromosomes look like an "X", two pairs of centrioles and double the amount of organelles fill the cell F. Prophase v cell is dividing into two identical cells G. Cytokinesis daughter chromosomes are beginning their migration to the poles on spindle fibers QUESTION 9 How do the two cells formed by a mitotic cell division compare…
A diploid cell (2n3D10) contains different types of chromosomesbased on the position of their centromeres Two chromosomes are found to be metacentric, while two chromosomes are acrocentric. Four are observedto have their centromeres submedially located while the remaining chromosomes have terminal centromeres. Illustrate the cell being described. Assuming the cell underwent cell division, drawthe appearance of the cell during the specified stages below a. Metaphase b. Anaphase c. Metaphase l d. Anaphasel e. Anaphase I| f. Telophase |