Mitosis - Organisation P1 Flashcards
1
Q
How many pairs of chromosomes do humans have?
A
23 pairs
2
Q
What happens during mitosis?
4 steps
A
- DNA replicates to form 2 copies of each chromosome
- Cell grows and copies its internal structures eg mitochondria and ribosomes
- 1 set of chromosomes is pulled to each end of the cell, nucleas also divides
- Cytoplasm and cell membrane divide to form 2 identical daughter cells
3
Q
What are chromosomes?
A
They are made up of genes that have the instructions for making new cells/tissues/organs.
4
Q
Name the functions of mitosis
A
- Essential for growth and development of multicellular organisms
- Mitosis happens when an organism has to repair itself
MAIN: GROWTH, DEVELOPMENT AND REPAIR
5
Q
How many chromosomes are there in a human egg cell?
A
23
6
Q
Chromosomes for females
A
XX
7
Q
Chromosomes for males
A
XY
8
Q
How a fertilised egg undergoes cell division
Mitosis or Meiosis
A
Mitosis
9
Q
How genetically identical cells are produced
Mitosis or Meiosis
A
Mitosis
10
Q
What are chromosomes made out of and where are they located?
A
They are found in the nucleas and they are made out of DNA
