Cell division 1.6

Question 1

What is mitosis used for?

Answer 1

-tissue growth in animals
-Replacement and regeneration for healing
-Asexual production

Question 2

What is the biological importance of mitosis?

Answer 2

Genetic stability and maintains chromosome number

Question 3

What are the 3 phases of cell division?

Answer 3

Interphase, mitosis, cytokinesis

Question 4

What are the 3 parts of interphase?

Answer 4

G1, S, G2

Question 5

What happens during G1?

Answer 5

-Size increases
-Organelle replication
-Protein synthesis

Question 6

What happens during S?

Answer 6

-DNA content doubles
-DNA is checked

Question 7

What happens during G2?

Answer 7

-Size increase
-ATP stores increase
-Protein synthesis

Question 8

What are the 4 phases of mitosis?

Answer 8

Prophase, Metaphase, Anaphase, Telophase

Question 9

What happens during prophase?

Answer 9

-Chromosomes are visible as 2 chromatids bound by a centromere
-Nucleolus and Nuclear envelope disappear
-Spindle radiates from centrioles, which go to poles

Question 10

What happens during metaphase?

Answer 10

-Chromosomes line up across the equator
-Spindle fibres attach to centromere

Question 11

What happens during anaphase?

Answer 11

-The centromere splits
-Spindle contracts, chromatids pulled to opposite end of cell
-Equal DNA content to each pole

Question 12

What happens during telophase?

Answer 12

-Chromatids uncoil and turn into chromosomes
-Spindle fibres break down
-Two new nuclear envelopes form and nucleolus reappears

Question 13

What happens during Cytokinesis?

Answer 13

-Division of cytoplasm
-Membrane constricts across the equator, forming 2 genetically identical daughter cells