Mitosis

Question 1

What are the 4 main stages of Mitosis?

Answer 1

G1, S, G2, and M

G1, S, and G2 = Interphase

Question 2

Interphase

Answer 2

Includes cell growth and DNA replication

Question 3

G1 Phase

Answer 3

Cell growth

Question 4

S Phase

Answer 4

Synthesis of DNA to make sister chromatids

Question 5

G2 Phase

Answer 5

More cell growth and intercellular organization

Question 6

M Phase

Answer 6

The Mitotic Phase (Mitosis)

Basically when Mitosis really starts

Question 7

Describe all characteristics

Prophase

Answer 7

• “First” step in M Phase
• Nucleus is gone
• Mitotic spindles form
• Chromosomes start to condense

Question 8

Describe all characteristics

Prometaphase

Answer 8

• “Late Prophase”
• Second step in M Phase
• Nuclear membrane is gone
• Chromosomes are condensed but not quite lined up at metaphase plate

Question 9

Describe all characteristics

Metaphase

Answer 9

• Third step in M Phase
• Chromosomes are lined up at metaphase plate
• Spindle checkpoint! Makes sure the sister chromatids will split evenly

Question 10

Describe all characteristics

Anaphase

Answer 10

• Fourth step in M Phase
• Sister chromatids are separated and pulled apart towards “poles”

Question 11

Describe all characteristics

Telophase

Answer 11

• Fifth step in M Phase
• Nuclear membrane reforms
• Nucleus reappears
• Chromosomes start to decondense
• Cells begins to divide

Question 12

Describe all characteristics

Cytokinesis

Answer 12

• Last step in M Phase
• Protein Actin forms a “drawstring” to finish dividing the cell
• Cleavage furrow