5.2 Chromosome behaviour in Mitosis

Question 1

Early prophase (2)

Answer 1

centrosomes replicate just before prophase
chromosomes start to appear as the chromatin coils up –> shorter and thicker

Question 2

Late prophase (2)

Answer 2

nuclear envelope disappears
nucleolus disappears
centrosomes move to opposite ends of the nucleus –> form poles of the spindle

Question 3

mitosis stages (4,5)

Answer 3

• early prophase
• late prophase
• metaphase
• anaphase
• telophase