4.1.2 Cell division

Question 1

what is a gene

Answer 1

sections of chromosomes that each have a unique code for the formation of proteins

Question 2

where are chromosomes found in the cell

Answer 2

nucleus

Question 3

how many chromosomes do humans have

Answer 3

46

Question 4

what is the cell cycle mostly needed for

Answer 4

growth and repair

Question 5

what is the cell cycle

Answer 5

it allows a single cell to copy the DNA and divide to produce 2 gentically identical daughter cells

Question 6

state all the stages of the cell cycle

Answer 6

G1
S
G2
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

Question 7

explain the interphase stages (G1,S,G2)

Answer 7

G1-cell cytoplasm and organelles increase
S-each chromosome copies itself
G2-Check DNA is replicated

Question 8

what is cytokinesis

Answer 8

2 identical daughter cells are made

Question 9

how are chromosomes arranged in the nucleus of a body cell

Answer 9

in pairs-46 chromosomes so 23 pairs

Question 10

what are the three main stages of the cell cycle

Answer 10

1.replication of DNA and synthesis of organelles
2.Mitosis
3.Divison of cell