ATAR Notes: Forum
VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Biology => Topic started by: chiral on April 15, 2012, 05:37:39 pm
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If one were looking at a large number of mitotic cells in embryonic tissue, one might expect to find cells of the four principal stages in the following order, from most abundant to least abundant.
I thought it was: telophase, metaphase, prophase, anaphase
but that is incorrect can someone please tell me what the order is and why
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Abundant in what? Chromosomes? You can google this.
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Well, think about it like this.
You start out just as a few cells, you looked like this (http://eqconline.org/wp-content/uploads/2012/03/EX_EMBR_BLAST.jpg) for awhile.
Think about it, how did you get from those two cells, to what you are now? What needed to happen?
Look at the picture for clues as well...2 cells....4 cells... then 8 cells...whats happening?
Also, this was in the university of melbourne section, i moved it to the VCE bio section
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I would put the order
Prophase - since anaphase and telophase relate to one cell but BOTH would be undergoing prophase in the next cycle.
Telophase - unwinding and rebuilding nuclear membrane would take a while
Anaphase - seperation shouldn't take that long.
Metaphase - they are only in a perfect line for a fraction of time.
the pro/telo is a bit iffy though - are they about to start development or have they pretty much finished?
Suggestions?
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http://www.cix.co.uk/~argus/Dreambio/cell%20division/mitosis-timeline.gif
According to ^^^^ it is:
metaphase
Prophase
Telophase
Anaphase
Just google up mitosis timeline.
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It's definitely: (N.B. this is the normal mitotic order, not the answer to the OP)
Interphase (not really part of mitosis)
Prophase
Prometaphase <- not needed knowledge for VCE bio btw
Metaphase
Anaphase
Telophase
Cytokinesis (not part of mitosis)
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^ is that the order of most abundance or are you referring to the mitosis stages in order or do they both coincide?
I thought the question was referring to what stage would be most abundant and this would depend on what stage takes longest to occur?
But i'm not sure, could you please explain
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I was just referring to the normal order of mitosis, I think I may have misinterpreted Flying Emu's post then... oops
edit: looking at the question, the order would be metaphase, prophase, prometaphase, telophase and anaphase
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Okay thanks :)
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I think I may have misinterpreted Flying Emu's post then... oops
Yeah my post was a bit unclear and could have interpreted both ways so, sry for the confusion.
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the process of mitosis is subdivided into the four categories only for our convenience, and they dont necessarily begin and end at incredibly specific times. (the process has only been separated to help us remember the events that occur). for instance, what u may define as a cell near the end of prophase may appear to me though at the start of metaphase (prometaphase). Therefore, this question above doesnt have a quantitative/objective answer. it may vary both on the discretion of the observer, and the appearance of the cell. For all we know, the mitotic cycle of all cells may be syncronized, and they may all be in telophase. dont stress about mitosis anyway. its unit 4 stuff. and if ur i year 11, dont stress at all anyway, even if its on ur exam :D