For some kinds of experiments, biologists use isolated cells grown in culture. Cells differ significantly in their doubling times (the amount of time it takes for one cell to divide into two cells). Plant cells can double every Animal cells (matrix requiring) can double every Animal cells (nonmatrix requiring) can double every Yeast cells can double every Bacteria cells can double every 18 hours 18 hours 14 hours 2 hours 20 minutes a) If you start with one cell of each type, which type will have the most cells after 1 week? i) plant bacteria ii) matrix requiring animal iii) nonmatrix animal iv) yeast v) b) If you start with one cell, how many plant cells will there be after 1 week?

For some kinds of experiments, biologists use isolated cells grown in culture. Cells differ significantly in their doubling times (the amount of time it takes for one cell to divide into two cells). Plant cells can double every Animal cells (matrix requiring) can double every Animal cells (nonmatrix requiring) can double every Yeast cells can double every Bacteria cells can double every 18 hours 18 hours 14 hours 2 hours 20 minutes a) If you start with one cell of each type, which type will have the most cells after 1 week? i) plant bacteria ii) matrix requiring animal iii) nonmatrix animal iv) yeast v) b) If you start with one cell, how many plant cells will there be after 1 week?

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter6: Reproduction At The Cellular Level

Section: Chapter Questions

Problem 1ACQ: Figure 6.4 Which of the following is the correct order of events in mitosis? a. Sister chromatids...

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Need help with question: -If a nucleus has 12 chromosomes during interphase,how many chromosomes does it have during metaphase? How many are there after mitosis has finished? - the contrast of the cleavage furrow with the cell plate. Offer details at the cellular level.
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.
Which statements are true? Explain why or why not.1 Since there are about 1013 cells in an adult human,and about 1010 cells die and are replaced each day, webecome new people every three years.2 In order for proliferating cells to maintain a rela-tively constant size, the length of the cell cycle must matchthe time it takes for the cell to double in size.3 While other proteins come and go during thecell cycle, the proteins of the origin recognition complexremain bound to the DNA throughout.4 Chromosomes are positioned on the metaphaseplate by equal and opposite forces that pull them towardthe two poles of the spindle.5 Meiosis segregates the paternal homologs intosperm and the maternal homologs into eggs.6 If we could turn on telomerase activity in all ourcells, we could prevent aging.
Comparing Mitosis and Meiosis: How many cells at the end? The ploidy of the end cells? The purpose of the process (when is it used)? The differences in the steps of each process (eg - how are metaphase, metaphase I, and metaphase II different)?
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.
Figure 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.
The mitotic spindles arise from which cell structure? centromere centroscme kinetochore cleavage furrow
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.
Question1. A cell contains 4 metacentric, 4 acrocentric, and 2 submetacentric chromosomes. Under normal conditions, what percentage of the daughter cells after meiosis will have... a. 4 metacentric chromosomes?b. 2 pairs of acrocentric and submetacentric each?c. A pair of submetacentric chromosomesd. 2 acrocentric chromosomes?
23. what stage of mitosis in which chromosomes begin to undergo a condensation process that will continue until metaphase?a. interphaseb. telophasec. prophased. prometaphase24. this stage of mitosis is characterized by an abrupt separation of sister chromatidsa. interphaseb. cytokinesisc. anaphased. prophase
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Metaphase- Mitosis a) Chromosomes line up at the equator of the cell. b) One spindle fiber of the very conspicuous spindle system attaches to the centromere of each chromosome.