INTRO TO CELL DIVISION

Organisms can reproduce…• _____________________

• ______________________

- simple cell division - cell duplicates genetic material

- two parents

- 2 new genetically identical cells

- genetic material from each parent combine

- genetically different offspring

Roles of cell reproduction

• Replacement of _____ or ______ cells

• _____________

• Production of ______________

THE CELL CYCLE

* Events from “birth” of eukaryotic cell to when it reproduces

* How ________ a cell divides depends on the type of cell it is.

_____________: muscle cells, nerve cells (neurons), and liver cells

______________: cells that line stomach and mouth, skin cells

Before cell division…INTERPHASE

• Cell carries out __________________and performs functions

• Up to ___________of cell the cell cycle is spent in interphase

______________ phase

- cell s the # of organelles

- protein synthesis

- cell grows and carries out cellular functions

______________ phase

- continued growth and metabolism

______________ phase

- DNA duplicates

- protein synthesis

CHECKPOINT #1 (after G1)

1) Enough growth?

2) Need for new cells?

3) DNA undamaged?

CHECKPOINT #2 (after G2)

1) DNA replicated?2) Enough growth?

M (mitotic) PHASE

• Cell actively _______________

• ________________ and ________________

Terms• Chromatin – • Chromosomes – • Diploid cells –

• Haploid cells –

• Homologous Chromosomes –

• Genes –

PROPHASE

METAPHASE

ANAPHASE

TELOPHASE

• Cells in a cancerous tumor ____________at an abnormally fast rate and become irregular in appearance.

• When individual cells ___________(travel from the original tumor), the cancer can spread.