cell division

Question 1

cell continuity

Answer 1

all cells develop from pre-existing cells

Question 2

what are the 3 steps to forn a new cell

Answer 2

1. produve materials it will need 2. grow larger 3. reproduces to form a new cell

Question 3

chromosomes

Answer 3

are coiled threads of DNA and protein that become visable in the nuclues at cell division

Question 4

genes

Answer 4

is a section of DNA that contains the instructions fro the formation of a particular protein

Question 5

Haploid cells

Answer 5

has one set of each chromosomes in its nucleus eg Sperm cells

Question 6

Diploid cells

Answer 6

has two sets of each chromosome in its nucleus one given by your mother and one from your father

Question 7

homologus pairs

Answer 7

two chromosomes of similiar size woth the same sequence of genes

Question 8

cell cycle

Answer 8

changes that take place in a cell between one division and the next

Question 9

phases of the celll cycle

Answer 9

1. interphase 2. prophase 3. metaphase 4. anaphase 5. telophase

Question 10

what happens during interphase

Answer 10

-producing new organelles -late interphase DNA is replicated

Question 11

what happenes during prophase

Answer 11

-chromosomes visibly double stranded -nucleur memebrane breaking down -spindle fibre appear

Question 11

mitosis

Answer 11

form of nuclear division where one nucleus becomes two nuclei, both with same chromosomes and genes

Question 12

what happens during metaphase

Answer 12

-chromosome along equater of cell -spindle fibres attached to the centromere -nucleur membrane broken down

Question 13

what happens during anaphase

Answer 13

-spindlefibres contract -pull chromosome to either pole

Question 14

what do spindlefibres do

Answer 14

they contract and pull chromosome to either pole

Question 15

what happens during telophase

Answer 15

-chromosomes now chromatin -spindlefibre break down