(b) If there are 20 chromatids in a cell, how many centromeres are there? Explain your answer. (e) Diagrammatically, show a metacentric chromosome in G1 phase of the cell cycle and in G2 of the cell cycle. (d) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei containing how many chromosomes? (e) If cells in the process of dividing are subjected to colchicine, a drug that interferes with the functioning of the spindle apparatus, at which stage will mitosis be arrested?

(b) If there are 20 chromatids in a cell, how many centromeres are there? Explain your answer. (e) Diagrammatically, show a metacentric chromosome in G1 phase of the cell cycle and in G2 of the cell cycle. (d) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei containing how many chromosomes? (e) If cells in the process of dividing are subjected to colchicine, a drug that interferes with the functioning of the spindle apparatus, at which stage will mitosis be arrested?

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

Chapter14: Dna Structure And Replication

Section: Chapter Questions

Problem 11TYK: Discuss Concepts Eukaryotic chromosomes can be labeled by exposing cells to radioactive thymidine...

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Similar questions

Beginning with the G1 phase of the cell cycle, describe the levelof compaction of the eukaryotic chromosome. How does thelevel of compaction change as the cell progresses through thecell cycle? Why is it necessary to further compact the chromatinduring mitosis?
In mitosis, what chromatid combination(s) will be present during metaphase? What combination(s) will be present at each pole at the completion of anaphase?
What will be the outcome if anaphase proceeded even thoughthe sister chromatids were not properly attached to theirrespective microtubules and lined up at the metaphaseplate?
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?
illustrate and briefly describe the alignment, pairing, and disjunction ofsister chromatids during mitosis. Include the molecular complexes cohesin and shugoshin and the enzyme separase.
The mitotic cell divisions in the early embryo ofD. melanogaster occur very rapidly (every eightminutes).a. If there were one bidirectional origin in the middleof each chromosome, how many nucleotides wouldDNA polymerase have to add per second to replicate all the DNA in the longest chromosome(66 Mb) during the eight-minute early embryoniccell cycles? (Assume that replication occurs duringthe entire cell division cycle.)
The cell cycle of an average mammalian cell is illustrated below. How long did it take for the above-illustrated mammalian cell to complete one cell cycle?How long did the mitosis/cytokinesis phase (M phase) last? What % of the total cell-cycle timedoes that constitute to? What phase takes the longest time to complete during cell cycle and what % of the total cellcycle time does that constitute to? Explain why you think this might be the longest phase of thecell cycle.How long was the S phase? What is happening in the cell during the S phase?
Why is a chromosome with two centromeres (adicentric chromosome) unstable? Would a backup cen-tromere not be a good thing for a chromosome, giving ittwo chances to form a kinetochore and attach to microtu-bules during mitosis? Would that not help to ensure thatthe chromosome did not get left behind at mitosis?
A cell containing 48 chromatids at metaphase would, at its completion, produce two nuclei each containing how many chromosomes?
1. Which among the lettered cells in Fig 2 are at interphase stage? 2. What mitotically important events occur in the cell during interphase? 3. What feature is labelled “V” in figure 2?
What is the order in which the following events occur during cell division: A. anaphase B. metaphase C. prometaphaseD. telophase E. lunar phaseF. mitosis G. prophaseWhere does cytokinesis fit in?
why During Mitosis, Sister ChromatidsSeparate and Two Daughter Nuclei Form?