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9 0 / 6 2 / Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 99/26/09 1:10:32 AM From a to an an to Cell a From stage. 1 stage—is a period of growth and final final stage—is a period of growth and 2 2 6

2 6 i . 4 5 4 1 9 8 _ t u Two new daughter cells result from and . Two During , duplicated DNA condenses into . of the cell. During , the chromosomes line up in the middle Before a cell divides, it makes copies of all its . In mitosis, the nucleus and its contents divide. In cytokinesis, the and its contents divide. . together by a structure called the . The sister are held G The final stage of —the Interphase begins with a period of rapid growth—the G Interphase begins with a period the cell replicates its strands of . During the S stage of interphase, identical strands of DNA that make up the duplicated are the two Interphase makes up most of the . Interphase makes up most of the the cell is called chromatin. During interphase, the DNA in Interphase is the period of growth and development for a cell. period of growth and development Interphase is the stages—rapid growth and most cells go through three During interphase, of DNA, the genetic information in a cell; replication of the organelles; replication and preparation for . reproduces. During the mitotic phase, a cell and produce new cells. and produce new and the mitotic phase. phases of the cell cycle—interphase There are two main Most cells in an organism go through a cycle of growth, development, and division and division development, a cycle of growth, go through in an organism Most cells called the cell cycle. cells, develop, replace old or damaged cell cycle, grow and Because of the preparation for mitosis. O s n A _ F Phases of Mitosis Replication Phases of Interphase Length of a Cell Cycle Phases of the Cell Cycle Phases of the Cell The Cell Cycle The Cell R

C _ 4. 1. 2. 1. 2. 3. 4. 5. 1. 2. 3. 1. 2. 2. 3. 4. 1. 1. 4. 5 T2 F. E. D. C. B. Lesson 1: The Cell Cycle and Cell Division and Cell Cycle Cell The 1: Lesson A. Lesson Outline for Teaching Teaching Outline for Lesson 6 0 _ 2 6 0 _ 4 0 2 CC204_062_065_CRF_AnsOut_891454.i62 62 CC204_062_065_CRF_AnsOut_891454.i63 63 2 0 4 _ 0 6 2 _ 0 6 5 _ C R

F Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. _ A n s O u t From a Cell to an Organism During mitosis,thenucleusanditscontentsdivideintwo. What happensduringmitosis? Discussion Question H. G. Lesson continued Outline _ 8 2. 1. 3. 2. 1. 4. 3. 9 1 4 Results ofCellDivision Dividing theCell’s Components 5 4 . i 6 3

multicellular organisms,replacementofworn-outordamagedcells,andrepair The cellcycleisimportantforreproductioninsomeorganisms,growth other andtotheoriginalcell,whichnolongerexists. The cellcycleresultsintwonewdaughtercellsthataregeneticallyidenticaltoeach cells form. In plantcells,a(n)cellplategrowsoutwardtowardanewwalluntiltwo membrane comestogethertodividethecell. In animalcells,a(n)furrowinthemiddleofcellsgetsdeeperuntilcell membrane aroundeachdaughtercell. After mitosis,cytokinesisusuallydividesacell’s cytoplasm,forminganewcell During ,chromosomesbegintouncoil,andtwonewidenticalnucleiform. are pulledinoppositedirectionsbythespindlefibers. During ,sisterchromatidsineachduplicatedchromosomeseparateand damaged tissues. 6 3 99/26/09 1:10:34AM / T3 2 6 / 0 9

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