6.2 Mitosis

Question 1

what are the four stages of mitosis in oder

Answer 1

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

PMAT!

Question 2

what happens in early prophase

(mitosis) P for preparation stage

Answer 2

• chromatin fibres coil and condense:become visable
• protein microtubles form spindle shaped structures to link the poles
• two centrioles (help ) migrate to opposite poles to help the formation of spindles
• nuclear membrane dissolves

Question 3

how do chromosomes become visable

Answer 3

dna associates with histone proteins to form a complex called chromatin. chromatin condenses and coils to form chromosones wich become visible

Question 4

what happens in late prophase?

mitosis

Answer 4

spindle microtubles attach to centromers and begin arragning the chromosones

Question 5

what happens during metaphase

(mitosis) M for middle

Answer 5

chromosomes are moved by spindle fibres to equator form: metaphase plate

Question 6

what happens during Anaphase

(mitosis) A for anti (they go to opposite sides)

Answer 6

• centromere divides (not splits!)
• chromatids pulled to opposite poles by shortning (not contracting ) spindles
• v shaped due to being dragged in liquid cytosol

Question 7

what happens in teleophase

(mitosis) T for the end

Answer 7

• the nuclear envelope refoms
• chromosomes uncoil
• nucleuolous is formed