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14 The Cell Cycle .pdf



Original filename: 14 The Cell Cycle.pdf
Title: Chapter 10: Cell Growth and Division
Author: New Hanover County Schools

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The Cell Cycle
1

Reproduction
• Asexual Reproduction:
– Involves only 1 organism
– New individual is genetically identical to
parent-clone
• Single celled organisms
–- binary fission: cell divides in 2

2

Multicelled organisms:
• Budding
• Plant propagation
• Parthenogenesis

3

Reproduction
• Sexual Reproduction:
– Involves 2 parental organisms
– New individual is different from either
parent
– Leads to greater genetic diversity

4

• Sexual Reproduction:

5

Chromosome Structure
• Chromatin: DNA and protein in long, thin
thread-like, invisible form

6

Chromosome Structure
• Chromosomes: Condensed chromatin
that appear right before cell division
– Sister chromatids- contain exact copies of
DNA– Centromere- protein “button” holds
chromatids together

7

Chromosome Structure

8

The Cell Cycle
• The time it takes from 1 cell division to
the next
• Varies in length of time depending on
cell type

9


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