Aim: What are the major changes in the nucleus during cell division?

Part 3 of Sheena’s story

Fill in Class Notes on Mitosis

During presentation

Mitosis in a single celled organism

• This type of reproduction involves no exchange of genetic material, and is a type of asexual reproduction. This form of asexual reproduction is often called 'fission'

Mitosis in multi-cellular organisms occurs for

• Growth • Repair

Asexual ReproductionBudding

• Although capable of sexual reproduction, hydras reproduce most of the year by producing external asexual buds that eventually pinch off at the base and become new individuals. 

Budding Hydra

Asexual Reproduction in Plants

Underground stems

• rhizomes • bulbs • corms and • tubers

Asexual Reproduction in Plants

• Bulbs and Tubers

Mitosis also occurs during early embryonic development

• Fertilized egg • Fetus

Cell division involves the process of Mitosis

Step 1

(S phase of Cell Cycle)

Chromosomes Duplicate

Chromosomes make more of themselves

Cell Division• Step 3 Metaphase

Chromosomes line up in the middle of the cell

Cell Division• Step 4 Anaphase

Double stranded chromosomes pull away from each other

Animal Cell

Plant Cell

Step 5 of Cell Division is Cytokinesis

Animal Cell Plant Cell

Cancer developsdue to the loss of growth control in cells

during cell division.

Stages of tumor development

A B Hyperplasia

C

Dysplasia

D in situ cancer malignant