Mitosis introduction

The Life Cycle of a Cell

The Cell Cycle and Mitosis

Are all cells doing the same thing at the same time?

Find examples of cells that look like they are doing something different.

The Cell Cycle

A cell spends most of it’s life in what part of the cell cycle?

Mitosis- making a new nucleus, then a new cell

Steps of Mitosis

Chromatids

Cell WallCytoplasm

Interphase

What phase is the cell shown in? Prophase

The original and duplicate strands of DNA are called sister…. Chromatids

What disappears during prophase?

Nuclear membrane, nucleolus

What phase is the cell shown in? Metaphase

Where are the chromatids located during metaphase? Middle

What’s another name for the center or middle of the cell? Equator

What phase is the cell shown in? Anaphase

What attaches the chromatids to the spindle fibers? Centromere

What phase is the cell shown in? TelophaseWhat reappears in this phase?

Nuclear membrane, nucleolus

Cell plate

How does cytokinesis differ in this cell from the one shown in the previous slide?

What are the two organelles (circled in red) that migrated to opposite poles of the cell during prophase called? CentriolesWhat role do these organelles play in cell division? They form the spindle apparatus

What do we call the two cells formed from mitosis?

Daughter cells

What are the three parts of interphase called?

G1G2

Synthesis

What happens to the DNA during the synthesis stage? Duplication

Why do we duplicate the DNA during interphase?

So that the daughter cells have the same information as the mother cell!