All Cells Arise From Other Cells

Question 1

Mitosis

Answer 1

Two genetically identical daughter cells are produced
Same number of chromosomes as the parent cell

Question 2

Meiosis

Answer 2

Four non-identical daughter cells are produced
Each with half the number of chromosomes as the parent cell

Question 3

interphase

Answer 3

G1
S
G2

Question 4

G1

Answer 4

organelles replicate
Many proteins formed

Question 5

S

Answer 5

DNA replication occurs
Each chromosome now made up of two chromatids

Question 6

G2

Answer 6

Continued organelle replication
Energy store produced
Centrioles replicate

Question 7

Prophase

Answer 7

Chromosomes condense and become visible
Also shorten and thicken
Centrioles move to opposite poles
Spindle fibres develop forming the spindle apparatus
Nucleolus disappears
Nuclear envelope breaks down

Question 8

Metaphase

Answer 8

Chromosomes seen as two sister chromatids joined by the centromere
Some spindle fibres are attached to centromeres others span pole to pole
Chromosomes like up along the equator of the cell

Question 9

Anaphase

Answer 9

Centromeres divide half spindle fibres contract pulling sister chromatids apart
Chromatids move to opposite Poles of the cell

Question 10

Telophase

Answer 10

Chromosomes reach the poles
Chromosomes become longer and thinner and are no longer visible
Spindle fibres disintegrate
Nuclear envelope and nucleoli re-form

Question 11

Cytokinesis

Answer 11

Cytoplasm divides
Two genetically identical daughter cells are formed

Question 12

Malignant tumour

Answer 12

Tumour that can spread to surrounding tissues and/or where some cancer cells break Off and travel in the blood to other sites forming new tumours

Question 13

Benign tumour

Answer 13

Tend to grow more slowly and are less likely to be life threatening

Question 14

What other cells are often affected in patients undergoing cancer treatment?

Answer 14

Hair
Bone marrow
Skin and the lining of digestive system