Mitosis

Question 1

What are the 4 stages of mitosis?

Answer 1

Prophase
Metaphase
Anaphase
Telophase

Question 2

Describe prophase.

Answer 2

• Chromatin condense into chromosomes
• Centrioles start moving to poles of the cell
• Centrioles form a network of protein fibres called spindles
• Nuclear envelope breaks down and chromosomes lie free in cytoplasm

Question 3

Describe metaphase.

Answer 3

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

Question 4

Describe anaphase.

Answer 4

• Centromeres divide
• Each pair of sister chromatids separate
• Spindles contract, pulling chromatids to opposite poles

Question 5

Describe telophase.

Answer 5

• Chromatids reach opposite poles on spindle
• Chromatids uncoil
• Nuclear envelope forms around each group of chromosomes
• Cytokinesis occurs
• 2 daughter cells, that are genetically identical to the parent cell, are produced.
• Each daughter cell starts interphase to get ready for the next round of mitosis.

Question 6

What is cytokinesis?

Answer 6

When the cytoplasm divides during telophase.

Question 7

Describe interphase.

Answer 7

• Occurs before mitosis
• The cell prepares to divide;
  
  • DNA unravels and is replicated
  • Organelles are replicated
  • ATP content within the cell is increased