Chromosomes And Mitosis

Question 1

Where are chromosomes found

Answer 1

Nucleus

Question 2

What do chromosome contain

Answer 2

Genes

Question 3

What are chromosomes made of

Answer 3

Dna molecules

Question 4

What do genes control

Answer 4

Development of different characteristics. E.g: hair colour

Question 5

Why do cells have two copies of each chromosome

Answer 5

One from mother one from father

Question 6

How many pairs of chromosomes does a human cell have

Answer 6

23

Question 7

What is the stage called when the cell divides

Answer 7

Mitosis

Question 8

What is mitosis used for

Answer 8

To grow and replicate cells that have been damaged

Question 9

What happens in the first stage of the cell cycle

Answer 9

Growth and Dna replication
The cell grows and increases the amount of subcellular structures such as mitochondria and ribosomes
The cell then duplicates the dna, so there’s one copy for each new cell
The Dna is copied and forms X shaped chromosomes.
Each arm is an exact copy of the other.

Question 10

What happens in the second stage of the cell cycle

Answer 10

Mitosis
Chromosomes line up at the centre
Cell fibres pull them apart. The two arms of each chromosome go to opposite ends of the cell
Membranes form around each of the sets of chromosomes. These become the nuclei of the two new cells-the nucleus has divided
Lastly the cytoplasm and cell membrane divide

Question 11

What are the products of the cell cycle

Answer 11

2 identical daughter cells with the same Dna

The dna is identical to the parent cell