KA1

How do we grow and repair

Cells divide to produce new ones

What must be transferred to each cell

Chromosome

How do we ensure that all cells are identical

A complete copy of chromosomes are passed on

How do you know if it is a chromosome or chromatids

A chromosome is when its own it own, chromatids are when there is a pair (also when they are preparing to divide)

What is stage 1 to a chromosome dividing

Chromosome starts to become visible

Stage 2

Chromosomes replace become int pair of chromatids

Stage 3

Spindle fibres form and chromosomes move to the equator of the cell

Stage 4

Chromatids are pulled to opposite ends of the cell

Stage 5

The nuclear membrane forms

Stage 6

The cytoplasm divide and two daughter cells are formed

Where are stem cells found

Animals

What features do stem cells have

Directly involved in growth and repair .e.g. bone marrow

They have potential to become any type of cell in the body

Unspecialised

Can divid / go through mitosis

Where can stem cells be obtained

From embryos at a very early stage (tissue stem cells can be found throughout ur body during your life