Producing New Cells

Key Area 1

How do we grow and repair?

Cells divide and produce new cells

What must be transferred to each cell?

Chromosomes

How do we ensure that all cells are identical?

A complete copy of chromosomes are passed on

That is the definition of stage 1 of cell division?

Chromosomes start to become visible

What is the definition of stage 2 of cell division?

Chromosomes replicate becoming pair of chromatids

What the definition of stage 3 of cell division?

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

What is the definition of stage 4 of cell division?

Chromatids are pulled to opposite end of the cell

What is the definition of stage 5 of cell division?

The nuclear membrane forms

What is the definition of stage 6 of cell division?

The cytoplasm divides and two daughter cell are formed

New cells are produced by mitosis throughout life.

Name the cell that found in the the early stages of embryo’s development which have to potential to develop into specialised cells.

Stem cells

State a reason other than growth why cells continue to be produced throughout life.

Repair cells

Stem cells can divide in order to self-renew

State the feature of stem cells that gives the the potential to develop into different types of cell.

unspecialised cells

Tissue stem cells can be transplanted to replace red blood cells.

Describe the feature of stem cells that allow the to be used this way.

They have the potential to become different types of cells

Name two types of stem cells?

Tissue

Embryo