mitosis

Question 1

describe interphase

Answer 1

cell growth. Synthesis of organelles. DNA replication and checking of genetic information

Question 2

what happens in G1

Answer 2

cellular contents, excluding the chromosomes are duplicated

Question 3

what happens in S

Answer 3

each of the 46 chromosomes is duplicated by the cell

Question 4

what happens in G2

Answer 4

the cell double checks the duplicated chromosomes for error, making any needed repairs

Question 5

what happens in prophase

Answer 5

1, the chromosomes become more distinct

2. the centriole divides in two and each migrates to opposite poles of the cell
3. protein fibre begin to produce a spindle in the cell
4. nucleolus shrinks and disintegrates
5. nuclear envelope disintegrates

Question 6

what happens in metaphase

Answer 6

1. each centriole is at a pole
2. centrioles produce spindle fibres
3. spindle fibres attach to the centromere of the chromosomes
4. chromosomes line up at the equator

Question 7

what happens in anaphase

Answer 7

1. spindle fibres contract
2. chromatids are pulled to opposite sides of the cell
3. each half of the cell receives one chromatid from each chromosome

Question 8

what happens in telophase

Answer 8

CHROMATIDS REACH THE POLES OF THE CELL
1. they begin to uncoil
2. they become less distinct
NUCLEAR ENVELOPE STARTS TO REFORM

Question 9

what happens in cytokinesis

Answer 9

1. the cell divides

2. daughter cells have the same chromosome number and genetic makeup as each other and the parent cell