Mitosis And Meiosis Analyze Guide Composition

BiologyВ MitosisВ andВ MeiosisВ StudyВ GuideВ

VideosВ ifВ youВ want/needВ them. В

https://www.youtube.com/watch?v=L0kВ­enzoeOMВ

https://www.youtube.com/watch?v=qCLmR9В­YY7oВ

MaybeВ helpfulВ sites? В

http://www.cellsalive.com/mitosis.htmВ

http://www.cellsalive.com/cell_cycle.htmВ

1 . ​

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DiagramВ andВ labelВ aВ chromosome. В

installment payments on your ​

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DescribeВ theВ structureВ ofВ aВ nucleosome. В WhatВ isВ theВ roleВ ofВ theВ nucleosomeВ inВ supercoilingВ ANDВ inВ theВ regulationВ ofВ transcriptionВ (YouВ willВ haveВ toВ checkВ CampbellВ Ch. В 18В­pp. )В

TheВ nucleosomeВ isВ basicallyВ

three or more. ​

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InterphaseВ isВ brokenВ downВ intoВ distinguishableВ phases. В WhatВ areВ theseВ partsВ ofВ InterphaseВ andВ whatВ happensВ inВ theВ cellВ forВ each? В

Interphase is broken down into G​

S phase,  and G​

.  During G​

, В theВ cellВ growths, В producesВ

1,  ​

2​

1​

protein, В producesВ organelles, В andВ doesВ normalВ cellВ activityВ (NCAВ­В nonВ IBВ term). В DuringВ SВ (SВ standsВ forВ synthesis)В phase, В theВ cellВ copiesВ DNAВ throughВ semiconservativeВ DNAВ synthesis. В SomeВ cellsВ continueВ NCA, В whileВ someВ freezeВ allВ cellВ activity. В DuringВ G​, В theВ cellВ duplicatesВ

2​

chromosomesВ toВ getВ readyВ forВ mitosis, В asВ wellВ asВ grow, В makeВ organelles, В makeВ proteins, В andВ NCA. В

4. ​

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There are three important checkpoints in the cell cycle.  What are they,  what is being " checked”,  and what are the alternative pathways the cell can take for each?  G​

G​

and metaphase checkpoint.  At G​

,  the cell checks to see if the it needs to divide. If yes,  1,  ​

2​

1​

theВ cellВ continuesВ toВ SВ phase, В ifВ no, В theВ cellВ goesВ intoВ G​ В whereВ itВ justВ doesВ normalВ cellВ activityВ

0​

forever and ever.  The next checkpoint is the G​

gate, В whereВ theВ cellВ checksВ toВ seeВ ifВ

2​

DNAВ isВ damaged, В andВ fixesВ itВ ifВ itВ is. В TheВ nextВ checkpointВ happensВ inВ Mitosis, В rightВ afterВ metaphase, В andВ isВ calledВ theВ metaphaseВ checkpoint. В Here, В theВ cellВ checksВ toВ seeВ ifВ everythingВ linedВ upВ rightВ duringВ metaphase, В andВ ifВ everythingВ isВ attached, В soВ itВ canВ continueВ intoВ Anaphase. В

your five. ​

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InВ general, В explainВ howВ theВ eventsВ ofВ theВ cellВ cycleВ areВ controlled. В TheВ eventsВ ofВ theВ cellВ cycleВ areВ controlledВ byВ cyclins, В whichВ isВ basicallyВ allВ youВ needВ toВ know. В However , В ifВ youВ wantВ toВ knowВ more, В cyclinsВ actВ asВ activatorsВ forВ CyclinВ­dependentВ ProteinВ Kinases, В whichВ signalВ theВ cellВ cycleВ toВ continueВ throughВ phosphorylation. В В В В

6. ​

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What are the defining events for each of the four phases of mitosis?  I think the best way to show this is with a chart list hybrid:  Prophase​

В­В NuclearВ envelopeВ dissolves, В centriolesВ startВ makingВ microtubules, В nucleolusВ disappears, В andВ chromosomesВ supercoil, В В

​

Metaphase​

В­В ChromosomesВ lineВ upВ inВ theВ middleВ ofВ theВ cellВ (cellВ equator), В astersВ areВ visibleВ andВ inВ placeВ atВ eachВ endВ ofВ theВ cell. В

Anaphase (A. K. A Arnold­phase)​

В­В TheВ chromosomesВ areВ pulledВ apartВ (reallyВ theВ kinetochoresВ eatВ theВ microtubules). В

Telophase​

­ Cytokinesis (once you can see the cell starts to split,  then its in telophase),  chromosomes start to uncoil,  nuclear membrane reforms,  nucleolus returns,   Interphase again​

В­В theВ momentВ theВ cellВ hasВ splitВ bothВ cellsВ enterВ interphase. В В

several. ​

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WhatВ isВ cytokinesis, В andВ whereВ doesВ itВ fitВ inВ theВ cellВ cycle? В CytokinesisВ isВ whenВ theВ cellВ physicallyВ separatesВ intoВ twoВ newВ cells. В InВ animalВ cells, В theВ spindleВ fibersВ pushВ theВ cellsВ apart, В formingВ aВ cleavageВ furrowВ whereВ theВ cellВ separates. В InВ plantВ cells, В aВ cellВ plateВ isВ formedВ whereВ theВ plantВ separates, В andВ basicallyВ formsВ aВ newВ cellВ wallВ thatВ separatesВ theВ newВ cells. В ThisВ allВ happensВ duringВ Telophase. В В

8. ​

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DrawВ aВ diagramВ ofВ aВ cellВ withВ sixВ chromosomesВ atВ eachВ phaseВ ofВ mitosis. В BeВ ableВ toВ recognizeВ cellВ phasesВ fromВ photographsВ ofВ actualВ cells. В

HopefullyВ youВ haveВ thisВ inВ yourВ notes, В ifВ notВ whatВ haveВ youВ beenВ doingВ withВ yourВ life. В (SleepingВ isВ probablyВ theВ bestВ answer. )В

Regardless, В IВ willВ tryВ toВ postВ picturesВ hereВ later, В andВ ifВ youВ don'tВ seeВ thisВ thenВ thatВ meansВ thatВ laterВ hasВ passed. В...



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