Cell Division by Mitosis

Question 1

what does the nucleus contain

Answer 1

chromosomes, which are made of the molecule dna

Question 2

how many pairs of chromosomes do most human body cells contain

Answer 2

23 pairs (46 single)

Question 3

which body cells only have 23 single chromosomes

Answer 3

gametes (eg sperm or egg cell)

Question 4

what is the function of chromosomes

Answer 4

carry a large number of genes which determine many of our features

Question 5

what are the three stages of mitosis

Answer 5

1. dna replicates to form two copies of each chromosome, cell grows and copies internal structures
2. one set of chromosomes is pulled to each end of the cell, the nucleus also divides
3. cytoplasm and cell membrane divide to create 2 identical cells

Question 6

what are the functions of mitosis

Answer 6

1. essential for growth and development of multicellular organisms
   2.takes place when an organism repairs itself
2. happens during asexual reproduction