Chromosomes and mitosis Flashcards
1
Q
What are chromosomes and how many do we have
A
coiled up lengths of DNA
23 pairs / 23 from each parent
2
Q
What is the cell cycle
A
growth and DNA replication –> mitosis –> growth and DNA replication etc
3
Q
What do multicellular organisms use mitosis for
A
to grow or replace cells that have been damaged
4
Q
What happens in a cell that isn’t dividing
A
the DNA is spread out in long strings
5
Q
What does the cell need to do before it divides
A
grow and increase the amount or subcellular structures - mitochondria and ribosomes
6
Q
Describe/explain mitosis
A
chromosomes line up at the centre of the cell
cell fibres pull them apart
membranes form around each set of chromosomes - become nuclei
cytoplasm and cell membrane divide
