aim: what are the major changes in the nucleus during cell division? part 3 of sheena’s story fill...
TRANSCRIPT
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