Mitosis

Question 1

what is mitosis

Answer 1

nuclear division (division of the nucleus)

Question 2

what does mitosis produce

Answer 2

two genetically identical daughter cells

Question 3

why is mitosis neccessary

Answer 3

during growth, replacement and repair of tissues
asexual reproduction

Question 4

phases in mitosis

Answer 4

prophase
metaphase
anaphase
telophase

Question 5

what happens in prophase

Answer 5

nuclear envelope breaks down and subsequently disappears
chromosomes condense and become visible when stained
centrioles move to opposite poles of cell for the purpose of spindle formation

Question 6

what happens in metaphase

Answer 6

chromosomes moved by spindle fibres to the equator and line up on the metaphase plate

Question 7

what happens in anaphase

Answer 7

chromatids are separated - pulled to opposite poles of the cell by shortening spindle fibres

Question 8

what happens in telophase

Answer 8

nuclear envelope reforms around the new sets of chromosomes creating two daughter cells
the chromosomes start to uncoil and the nucleolus is reformed

Question 9

what is cytokinesis

Answer 9

the division of the cell into two separate cells

Question 10

how does cytokinesis occur in animal cells

Answer 10

a cleavage furrow forms around the middle of the cell
the cell surface membrane is pulled inwards by the cytoskeleton until it is close enough to fuse around the middle. forming two cells.

Question 11

how does cytokinesis occur in plant cells

Answer 11

vesicles from the Golgi apparatus begin to assemble in the same place the metaphase plate was formed.
the vesicles fuse with each other and the cell surface membrane dividing the cell in two
new sections of cell wall then form along the new sections of membrane