mitosis

Question 1

describe what happens to the chromosomes in prophase

Answer 1

-they become visible because its condensing

Question 2

escribe how a gene is a code for the production of a polypeptide. Do not include information about transcription or translation in your answer.

Answer 2

2. (In) triplet(s);
   (Because) base/nucleotide sequence;
3. (Determines) order/sequence of amino acid sequence/primary structure (in polypeptide);

Question 3

Mitosis is important in the life of an organism. Give two reasons why.

Answer 3

-growth in cells
-replicate cells
-geneticly identical cells
-asezual reproduction

Question 4

Describe the role of the spindle during mitosis.

Answer 4

-attatchment of chromosomes
-halves number of chromosome
-diploid

Question 5

what happens in the first 3 stages of mitosis

Answer 5

prophase - chromosomes condense , centromeres attach to spindle fibres

metaphase- chromosomes at centre of equator

anaphase- centromeres divide, abd chromatids pulled to opposite poles

all- spindle fibres shorten

Question 6

what happens to the centromeres in anaphase

Answer 6

• they divide , creating chromatids

Question 7

describe the SF, Centromeres, chromosomes in prophase

Answer 7

-SF- begin to shorten and attach to centromers
chromosomes- condense and are visable
Centromemrs- attatch to centromemer

Question 8

sf,ch, ce, in metaphase

Answer 8

SF- centromeres attach to spindle fibres(or prophase this happens too)
chromosomes- they line up in centre of equator
centromere- attach to sf

Question 9

anaphase

Answer 9

-centromers-they divide , creating chromatids
sf- pull chromatids apart
chromatids- sent to opposite ends of the poles