04. Cell reproduction.
Saint Ignatius College Geelong
All cells are derived from pre-existing cells.
Cells must reproduce for
growth of the organism.
repair of damaged cells.
replacement of dying cells.
reproduction of the species.
The series of event that take place in a cell leading
to its division (i.e. interphase + mitosis).
Cells spend most of their lives in interphase.
G1 (Gap 1)
DNA replication occurs chromosomes duplicating.
G2 (Gap 2)
Cell grows & preparation for the next cellular division.
Occurs in eukaryotic organisms.
Single celled eukaryotes e.g. paramecium.
Regions of growth & repair in animals.
Roots & shoot tips of plants (+ other meristemic tissue).
Mitotic cell division is used
To provide new cells for growth.
Repair and maintenance of tissues.
Occurs in somatic cells.
Involves one nuclear division.
Results in two genetically identical daughter cells.
Both daughter cells are diploid (2n).
Four stages (although process is continuous).
Prophase, Metaphase, Anaphase & Telophase.