1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 1 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division M: Mitosis 1. Breakdown of nuclear membrane 2. Condensation of chromosomes 3. Attachment of chromosomes to mitotic spindles Daughter cells Centrosome Cell membrane DNA Nuclear membrane Mitotic spindle Condensed chromosome Spindle pole

2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 2 G 1 : Cell grows in size, prepares for DNA replication Centrosome DNA Cell membrane Nuclear membrane

3. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 3 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication Centrosome DNA Cell membrane Nuclear membrane

4. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 4 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division Centrosome DNA Cell membrane Nuclear membrane

5. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 5 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division M: Mitosis Centrosome DNA Cell membrane Nuclear membrane

6. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 6 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division Centrosome DNA M: Mitosis 1. Breakdown of nuclear membrane Cell membrane Nuclear membrane

7. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 7 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division Centrosome DNA M: Mitosis 1. Breakdown of nuclear membrane 2. Condensation of chromosomes Condensed chromosome Cell membrane Nuclear membrane

8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 8 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division M: Mitosis 1. Breakdown of nuclear membrane 2. Condensation of chromosomes 3. Attachment of chromosomes to mitotic spindles Centrosome DNA Condensed chromosome Spindle pole Cell membrane Mitotic spindle Nuclear membrane

9. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 9 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division M: Mitosis 1. Breakdown of nuclear membrane 2. Condensation of chromosomes 3. Attachment of chromosomes to mitotic spindles Centrosome DNA Condensed chromosome Spindle pole Cell membrane Mitotic spindle Nuclear membrane

10. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 18.2 The cell cycle is the series of events that transpire between one cell division and the next Slide number 10 G 1 : Cell grows in size, prepares for DNA replication S: DNA replication G 2 : Cell prepares for division M: Mitosis 1. Breakdown of nuclear membrane 2. Condensation of chromosomes 3. Attachment of chromosomes to mitotic spindles Daughter cells Centrosome DNA Condensed chromosome Spindle pole Cell membrane Mitotic spindle Nuclear membrane