mitosis

Question 1

What is mitosis

Answer 1

Process of producing 2 diploid daughter cells with the same DNA by copying their chromosomes

Question 2

What happens during Prophase?

Answer 2

1.Chromosomes become shorter and thicker by coiling themselves (condensation) This prevents tangling with other chromosomes
2 Nuclear envelope disappears/breaks down
3 Protein fibres (spindle microtubules) form
4 Centrioles are moving toward opposite poles forming the spindle apparatus of microtubule

Question 3

What happens during Metaphase

Answer 3

1. Centrioles at opposite poles
   2.Chromosomes line up on the equator of the spindle
   3 Centromeres attach to spindle fibres

Question 4

What happens during Anaphase

Answer 4

1. Spindle fibres pull copies of chromatids to spindle poles to separate them
2. Mitochondria around spindle provide energy for movement

Question 5

What happens during Telophase

Answer 5

1 Chromatid at the pole
2 Sets of chromosomes form new nuclei
3 Chromosomes become long and thin, uncoil!
4 Nuclear envelopes form around the nucleus

Question 6

How much % time does Interphase take up of the cell division

Answer 6

90%

Question 7

What are the stages of interphase

Answer 7

G1,S,G2,G0,M-phase

Question 8

What happens during G1

Answer 8

• Protein synthesis and growth (10 hours)
• Preparation for DNA replication (e.g. growths of mitochondria)
• Differentiation, only selected genes are used to perform different functions in each cell

Question 9

What happens during s

Answer 9

DNA Replication

Question 10

What happens during G2

Answer 10

short gap before mitosis, organelles and proteins for mitosis are made (4 hours)

Question 11

What happens during G0

Answer 11

Resting phase (nerve cells)

Question 12

What happens during m phase

Answer 12

Mitotic division of the nucleus (Prophase, Metaphase, Anaphase, Telophase)
Cytokinesis (division of the cytoplasm)