Mitosis and meiosis

Question 1

What is mitosis?

Answer 1

Mitosis gives rise to two daughter cells tat are almost identical to the parent cells

Question 2

What is meiosis?

Answer 2

Gamates e.g egg and sperm but they only get half of the genetic information
The gamates pair together making a cell that is completely different from the parent cell

Question 3

What interphase stage

Answer 3

The interphase stage is where the cell grow, undergo protein synthesis and makes organelles
There are 2 stages which are G1, S, G2
G1- the cell grow for cell division
S- chromatids are copied and pasted so the 46 chromosomes will have 2 sister chromatids
G2- cells grow more for mitosis

Question 4

What happens in the Mitosis stage

Answer 4

1. prophase - chromatids untangle and become single chromosomes, there is a centromere and each end and the spindle fibre change the position of the chromosomes
2. Metaphase- the chromosomes align with the metaphase plate
3. Prometaphase-the nuclear membrane disintegrates
4. Anaphase- centrosomes pull the sister chromatids apart into different directions
5. Telophase- The cell have 2 nuclei and are split into 2 daughter cells

Question 5

What happens in the prophase 1 of meiosis?

Answer 5

Leptotene- nuclear meembrane distegrates and the chromsomes have a 2 sister chromatid.
Zygotene- Chromosomes bind to homologue ( tetrad)
Pachytene- Exchange of genetic material crossover swapping between the paterinal and materinal
Diplotene- homolgous chromsomes pulls away from each other

Question 6

What happens in the meiosis 1 stage?

Answer 6

Metaphase 1- tertard chromatids go to the metaphase plates
Anaphase 1- tetrad split and go into different directions
Telophase- Go into 2 daughter cells

Question 7

What happens in the meiosis 2 stage?

Answer 7

Prophase 2- nuclear membrane distegrates
Metaphase 2- spindle forms
Anaphase- chromatids split and go into different directions
Telophase 2 - Nuclei form 4 daughter cells