Chromosones And Mitosis

Question 1

What are chromosomes

Answer 1

Coiled up lengths of dna molecules which carry genes

Question 2

How many copies do body cells ave of each chromosome

Answer 2

2 One father and one mother

Question 3

How many chromosomes

Answer 3

23

Question 4

Steps of growth and dna replication

Answer 4

1) in a non dividing cell dna is spread out in long strings
2) the cell has to grow and increase the subcellular structures
3) it then duplicates the dna

Question 5

What’s are the steps of mitosis

Answer 5

4) chromosome slime up at the centre of cell and cell fibres pull them apart to opposite ends
5) membranes form around the chromosomes which become the nuclei
6) the cytoplasm and cell membrane divide
6) the cell has now produced to identical daughter cells