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Transcript
Specialized Cells
Cell theory states that all cells come from pre-existing cells.
1 fertilized cell  forms me!
But my cells are all different!
A cell specializes to form a specific function.
Chromosomes contain many many genes. A gene controls one specific thing about the
organism. As the organism develops, each cells keeps some genes ‘on’ and turns some genes
‘off’. This gives each cells a certain job to do. It becomes specialized or differentiated.
The structure often relates to the function of the cell. Check out the photographs in your text p. 59
Stem Cells = an undifferentiated cell that has the potential to become any kind of cell. When you are a
‘blastula’, all your cells are stem cells. (you are a ball of cells or a ‘blastula’ up to day 6 only).