HOW DO WE KNOW? how chromosomes are distributed during cell division, both in dividing somatic cells (mitosis) and in gamete- and spore-forming cells (meiosis). We found many opportunities to consider the methods and reasoning by which much of this information was acquired. How do we know that mitotic chromosomes are derivedfrom chromatin?

HOW DO WE KNOW? how chromosomes are distributed during cell division, both in dividing somatic cells (mitosis) and in gamete- and spore-forming cells (meiosis). We found many opportunities to consider the methods and reasoning by which much of this information was acquired. How do we know that mitotic chromosomes are derivedfrom chromatin?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter10: Cell Division And Mitosis

Section: Chapter Questions

Problem 1ITD: Biologists have long been interested in the effects of radiation on cells. In one experiment,...

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Similar questions

Define the following terms: a. chromosome b. chromatin
With regard to thickness and length, what do you think chromosomes would look like if you microscopically examined them during interphase? How would that compare with their appearanceduring metaphase?
In the tracking chromosomal DNA movement through mitosis experiment, how many chromosomes did each of your daughter cells contain? Why is it important for each daughter cell to contain information identical to the parent cell? How often do human skin cells divide? Why might that be? Compare this rate to how frequently human neurons divide. What do you notice?
Obvious differences in the position of chromosome copies are clear during metaphase of mitosis and meiosis. How would you describe these changes?
Compare and contrast the appearance of chromosomes AND the behaviour of chromosomes at analogous phases of mitosis and meiosis (e.g., metaphase of mitosis, metaphase I, metaphase II).
Does resulting daughter cells in mitosis and meiosis will have identical features with their parent cell? Why? Does Interphase prepare the parent cell for division by means of cell growth and synthesis? Why? Does the number of chromosomes found in the daughter cells after mitosis and meiosis will be the same as that of the parent cell? Why? 5 sentences each.
Does resulting daughter cells in mitosis and meiosis will have identical features with their parent cell? yes or no? Why? Does Interphase prepare the parent cell for division by means of cell growth and synthesis? yes or no? Why? Does the number of chromosomes found in the daughter cells after mitosis and meiosis will be the same as that of the parent cell? yes or no? Why?
A somatic cell has 46 chromosomes aligned at metaphase. How many chromosomes are present at anaphase, immediately after the centromeres have split?
If a bacterial chromosome were inserted into a eukaryotic cell, would it be stable? Would it segregate like eukaryotic chromosomes do during mitosis and meiosis? Why or why not?
The 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.
Metaphase to Anaphase Are all the chromosomes attached to the spindle and aligned properly at the equator of the cell?
Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that has two large and two small chromosomes, 2n=4. For unreplicated chromosome draw a line ( / ) and for replicated chromosome draw an X. Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate that the chromosomes are decondensed chromatin during interphase. Mark and label a place on one of the large chromosomes with the dominant allele of the “A” gene and put the recessive allele “a” on the other homolog. Mark and label a place on one of the small chromosomes with allele “B” and put the recessive allele “b” on the other homolog.