Mitosis

Question 1

What is Mitosis for?

Answer 1

1. Growth of the organism
2. Repair of tissues
3. replacement of old cells
   4.Asexual reproduction

Question 2

What are the main stages in order?

Answer 2

1. Prophase
2. Metaphase
3. Anaphase
4. Telophase

Question 3

What occurs in prophase?

Answer 3

1. Chromosomes condense and become visible.
   Consisting of two chromatids joined by a centromere.

Question 4

What occurs in metaphase?

Answer 4

2. Chromosomes align at equator attached to spindle by centromere

Question 5

What occurs in anaphase?

Answer 5

3. Centromere splits and chromatids separate, the chromatids move to opposite poles by contracting of spindle fibres.

Question 6

What occurs in telophase?

Answer 6

1. Chromosomes uncoil and nuclear envelope forms around the chromosomes at either end.

Question 7

What occurs during cytogenesis?

Answer 7

Cytoplasm divides via cleavage.

Question 8

What occurs during interphase?

Answer 8

DNA replicates .

Question 9

What are the stages within interphase?

Answer 9

1. G1- Growth
   S- Replication of DNA
   G2- Checking

Question 10

What checks occur during G1 phase?

Answer 10

1. Chromosomes are checked for damage, if there is damage then cell does not move into s phase until repairs made.

Question 11

What checks occur during S phase ?

Answer 11

Chromosomes are checked if they have been replicated, if not all have been replicated cell cycle stops.

Question 12

what checks occur in G2 Phase?

Answer 12

An additional check for DNA damage occurs after replication, cell cycle delayed.

Question 13

What checks occur during metaphase?

Answer 13

1. A final check determines wether the chromosomes are corrrectly attached to spindle fibres prior to anaphase.