Mitosis & Meiosis

Question 1

What is mitosis?

Answer 1

Nuclear division giving rise to genetically identical cells

Question 2

What is mitosis used for?

Answer 2

Growth
Repair of damaged tissues
Replacement of cells
Asexual reproduction

Question 3

Describe the process of mitosis.

Answer 3

-Before mitosis starts, each chromosome in the cell will copy itself exactly by forming X-shaped chromosomes
-Chromosomes then line up in the middle of the cell which is then pulled apart by cell fibres
-The cell divides into 2, each cell now has a copy of each of the chromosomes

Question 4

What is meiosis?

Answer 4

Nuclear division that gives rise to cells that are genetically different

Question 5

What is meiosis used for?

Answer 5

The production of gametes
increasing genetic variation in offspring

Question 6

Describe the process of meiosis.

Answer 6

-Chromosomes double themselves
-They then divide twice
-Chromosomes pair up along the center of the cell, which is then pulled apart by cell fibres, each new cell will have 1 chromosome pair
-Chromosomes will line up in the center of the new cell and get pulled apart by cell fibres
-Creates a total of 4 haploid daughter cells, these are the gametes