Mitosis

Question 1

What are the main 4 division stages for mitosis

Answer 1

Interphase prepares to divide me unraveling DNA

1) prophase
2) metaphase
3) anaphase
4) telophase

Question 2

What happens in prophase

Answer 2

Chromosomes condense
Centrioles start moving to opposite ends of cell forming network of protien fibres called spindle. Nuclear envelope breaks down

Question 3

What happens in metaphase

Answer 3

Chromosomes line up along middle of the cell and become attached to the spindle by their centrometre.

Question 4

What happens during anaphase?

Answer 4

Centromeres divide separating each pair of chromatids. Spindles contract pulling chromatids to opposite poles. V shaped

Question 5

What happens during telophase?

Answer 5

Reach opposite poles on spindle. Uncoil and become long and thin again.nuclear envelope forms. Cytoplasm divides and interphase starts again

Question 6

What is the cell cycle?

Answer 6

Period of cell growth and DNA Replication called interphase. Interphase is subdivided into 3 Sep growth stages G1 S G2

Starts with mitosis
Gap phase 1 grows n new organelles n protiens are made
Synthesis replicates DNA
Gap 2 keeps growing and protiens needed for cell division are made