Presentation on theme: "1 Review What are chromosomes Compare and Contrast How does the structure of chromosomes differ in prokaryotes and eukaryotes 2 Review What happens during."— Presentation transcript:
1 1 Review What are chromosomes Compare and Contrast How does the structure of chromosomes differ in prokaryotes and eukaryotes 2 Review What happens during each of the four phases of mitosis- write one or two sentences about each Predict What do you think would happen if the spindle fibers were disrupted during metaphase
2 Ch 10 Cell Growth and Division 10.2 The Process of Cell Division
3 ChromosomesCarries and passes on genetic information from one generation to anotherEach cell must copy its genetic information before cell division beginsEach daughter cell gets its own copyDifferent organisms have different number of chromosomes.
4 Prokaryotic Chromosomes Most prokaryotes contain a single, circular chromosomeLocated in the cytoplasm (no nucleus).
5 Eukaryotic Chromosomes Located in the nucleusMade up of chromatinDNA and histone proteins.
6 Eukaryotic Chromosomes Chromatin is DNA and histone proteins.
7 Eukaryotic Chromosomes DNA coils around histones to make nuclesome.
8 Eukaryotic Chromosomes Nucleosomes coil and form supercoils that form chromosomes.
9 The Prokaryotic Cell Cycle Regular pattern of growth, DNA replication, and cell divisionBinary fissionAsexual reproductionTwo genetically identical cells are produced.
10 The Eukaryotic Cell Cycle G1, S, G2, and MInterphase is G1, S, and G2.
11 G1 Phase: Cell GrowthCells increase in size and synthesize new proteins and organelles.
12 S Phase: DNA Replication New DNA is synthesized (chromosomes are replicated).
13 G2 Phase: Preparing for Cell Division Organelles and molecules are produced.
14 M Phase: Cell Division Mitosis Cytokinesis Division of the cell nucleusCytokinesisDivision of the cytoplasm.
15 Cell Structures Involved in Mitosis ChromatidEach strand of a duplicated chromosomeCentromereArea where each pair of chromatids is joinedCentriolesTiny structures in cytoplasm of animal cells that help organize the spindleSpindleFanlike microtubule structure that helps separate the chromatids.