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The Cell Cycle.

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Presentation on theme: "The Cell Cycle."— Presentation transcript:

1 The Cell Cycle

2 Chromosomes Carry genetic information in eukaryotes
Made of DNA and proteins Not visible in cell, unless the cell is dividing 2 identical chromatids (sister chromatids) make up 1 chromosome Centromere is the point where the sister chromatids attach

3 The Cell Cycle During the cell cycle the cell grows, prepares for division, and forms 2 daughter cells The longest phase of the cell cycle is interphase

4 Interphase Consists of G1, S, and G2
G1: cell grows the most, makes proteins and organelles S: DNA copies G2: shortest, organelles associated with division produced

5 Mitosis Process of nuclear division
Made up of 4 phases: prophase, metaphase, anaphase and telophase Centrioles are located in the cytoplasm and are necessary for division, they help organize the spindle Spindle fibers are microtubules that move the chromosomes during mitosis

6 Prophase Chromatin condense Centrioles separate Spindle begins to form
Nuclear membrane breaks down

7 Metaphase Chromosomes line up on “equator”
Chromosomes connect to spindle

8 Anaphase Sister chromatids separate into individual chromosomes

9 Telophase Chromosomes gather at poles
Chromosomes loose their distinct shape Nuclear membrane forms

10 Cytokinesis Division of the cytoplasm
Cell “pinches” in half at the cleavage furrow Results in 2 identical daughter cells with same chromosomes

11 Mitosis Video 1

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