AP Biology 2006-2007 Plant Anatomy AP Biology Basic plant anatomy 1 root root tip root hairs.
Time for the Cell Cycle Graphing an Onion Root Tip...Onion Root Tip Diagram 4. Pie Chart Graph Paper...
Transcript of Time for the Cell Cycle Graphing an Onion Root Tip...Onion Root Tip Diagram 4. Pie Chart Graph Paper...
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NAME:________________________________________________
TimefortheCellCycle
Question:Doallthephasesofthecellcyclerequirethesameamountoftimeforcompletion?
Hypothesis:_______________________________________________________________________________________________________________________________
Totestourhypothesisyouwillbecompletinganexperimentusingthedatafromonionroottipcells.Manycellsinonespecificphaseindicatethatalongperiodoftimeisrequiredforthecompletionofthatphase.Fewcellsinaspecificphaseindicateashortperiodoftimeisrequiredforcompletionofthatphase.
Materials:1.LabDirections2.DataRecordingSheet3.OnionRootTipDiagram4.PieChartGraphPaperProcedure
1. CountandrecordinTable16-1thenumberofcellsineachphaseofthecell
cycle.
a. CountallcellsinthefieldofviewanduseFigure16-1asaguide.
2. Totalthenumberofcellsontheonionrootsamplediagramandensurethatthisequalsthenumberofcellsyou
countedandrecordthisnumberin“totalnumbercounted.”
3. Oncethenumberofcellscolumniscompletemoveontothemathtodeterminetimeineachstagecolumn.
4. Tocalculatethetimeineachstage,usethefollowingformula: 𝐍𝐮𝐦𝐛𝐞𝐫𝐨𝐟𝐜𝐞𝐥𝐥𝐬𝐢𝐧𝐚𝐩𝐡𝐚𝐬𝐞𝐓𝐨𝐭𝐚𝐥𝐧𝐮𝐦𝐛𝐞𝐫𝐨𝐟𝐜𝐞𝐥𝐥𝐬𝐜𝐨𝐮𝐧𝐭𝐞𝐝
×𝐭𝐨𝐭𝐚𝐥𝐭𝐢𝐦𝐞𝐭𝐨𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐜𝐞𝐥𝐥𝐜𝐲𝐜𝐥𝐞
a. Thetotaltimetocompletethecellcycleis720minutesinanonionroottipcell
5. UsingyourdatafromTable16-1andtheoutlinebelow,prepareacirclegraphwhichshowsthenumberofminutes
thatonionroottipcellsspendineachphaseofthecellcycle.Checkoffeachstepasyougobelow:
� Graphyourdatausingthe“TimeinMinutes”columnfromTable16-1
� Thecircleisdividedinto18minutesections.Eachsectionofthegraphequals18minutes.Ifaphaseisnot
exactly18minutesoramultipleof18approximatethepositionofthelineonthegraph.
� Shadeeachphaseofyourgraphwithcoloredpencilsandlabelyourkeyaccordingly.
� LabelwhereG1,S,andG2wouldoccur.
� OutlineandlabelthephasesthatareapartofMitosisinblackpermanentmarkerandlabelthisarea“Mitosis.”
6. Usingthegraphyoucompletedanswerthequestionsthatfollow.
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DataTable16-1PhaseoftheCellCycle
NumberofCells
MathtoDeterminethetimeinEachStage
Time(inMinutes)InEachStage
NumberofSectionstoColor
Interphase
Prophase
Metaphase
Anaphase
Telophase
TotalNumberofCellsCounted
48
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Graph16-1
Title:__________________________________________________________________________________
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AnalysisQuestions:Answerallofthequestionsinfullsentences
1.Whichphaserequiresthelongesttimeforcompletion?
2.Whichphaserequirestheshortesttimeforcompletion?
3.Whatphaseisnotaccountedforinyourgraph?Whydoyouthinkthisisso?
4.Usingwhatyouhavelearnedinthisactivityreadthetablebelowtoanswerthequestionsthatfollow.
Table16-2PhaseoftheCell
CycleTime(Minutes)IttakesNormal
ChickenCellstoCompleteEachStageTime(Minutes)IttakesCancerousChicken
CellstoCompleteEachStageInterphase 540 380Prophase 60 45Metaphase 10 10Anaphase 3 3Telophase 12 10
a.Whatisthetotaltimeneededforanormalchickenstomachcelltocompletethecellcycle?
b.Whatisthetotaltimeneededforacancerouschickencelltocompletethecellcycle?
c.Howdocancercellsdifferfromnormalcellsintimerequiredformitosis?
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