SB2a Mitosis

Question 1

What is mitosis split into?

Answer 1

four main stages followed by the splitting of two cells.

Question 2

What are the stages of mitosis?

Answer 2

(interphase) - prophase - metaphase - anaphase - telophase - cytokinesis - (interphase)

Question 3

Interphase?

Answer 3

cells spends most of its life in this phase. DNA in the chromosomes copies itself ready for mitosis.

Question 4

Prophase?

Answer 4

chromosomes condense getting shorter + fatter. Nucleus starts to break down and spindle fibres appear.

Question 5

Metaphase?

Answer 5

chromosomes line up on the spindle fibres across the middle of the cell.

Question 6

Anaphase?

Answer 6

chromosome copies are seperated and moved to either end of the cell on the spindle fibres.

Question 7

Telophase?

Answer 7

chromosomes uncoil and become long and thin again. Membrane forms around each set of chromosomes to form two nuclei.

Question 8

Cytokinesis?

Answer 8

a cell surface membrane forms to seperate the two cells (leaving two identical daughter cells). Each daughter cell now enters interphase. Cell walls form in plant cells.

Question 9

Asexual reproduction?

Answer 9

organisms reproducing asexually by producing clones that are genetically identical to the parent. Mitosis is an example.

Question 10

The offspring in mitosis are?

Answer 10

genetically identical to the parent.

Question 11

Disadvantage and advantage of asexual reproduction? (2)

Answer 11

.very fast
.doesn’t create genetic variation

Question 12

Cancer?

Answer 12

disease caused when cells divide uncontrollably and spread into the surrounding tissue because the cells were mutated to be uncontrollable.

Question 13

What does a diploid nucleus have?

Answer 13

two sets of chromosomes.

Question 14

Each chromosome in a diploid nucleus is what ?

Answer 14

copied and copies remain attached, forming an X shape.

Question 15

What does mitosis produce?

Answer 15

two diploid daughter cells.