Mitosis

Question 1

Cell division

Answer 1

Each cell has chromosomes which contain DNA. When making new cells, the DNA must be replicated so that each new cell contains the same number of chromosomes.

Question 2

What is Cell division responsible for?

Answer 2

s responsible for growth, replacement and repair

Question 3

Chromosomes

Answer 3

In humans there are 46 chromosomes or 23 pairs of chromosomes called diploids The mature egg and sperm have a set of 23 chromosomes called haploids

Question 4

When are chromosomes visible?

Answer 4

Only during cell division

Question 5

Female chromosome

Answer 5

XX

Question 6

Male chromosomes

Answer 6

XY

Question 7

Mitosis

Answer 7

This division of cells results in daughter cells with exactly the same types and number of chromosomes as in the parent cell Most cells in the body undergo mitosis e.g. Hair, skin etc

Question 8

Phases of mitosis

Answer 8

Interphase 
Prophase 
Metaphase 
Anaphase 
Telophase 
Cytokinesis

Question 9

Mitosis - interphase

Answer 9

DNA is replicated.

Centrosome, which later forms the spindle, is also replicated.

Question 10

Mitosis - prophase

Answer 10

DNA continues condensing into chromosomes.

Chromosomes continue to condense and appear as double-chromatids.

spindle begins to form.

Question 11

Mitosis - metaphase

Answer 11

The spindle organises the chromosomes on the equator of the cell

Question 12

Mitosis - anaphase

Answer 12

The chromosomes segregate pulling the chromatids apart

Question 13

Mitosis - telophase

Answer 13

Two new nuclei form around the cells

Question 14

Mitosis - cytokinesis

Answer 14

Division of the cytoplasm is complete. The two daughter cells are now separate cells.