B6 - DNA

Question 1

What is a mutation

Answer 1

A mutation is a random change in an organisms DNA that can be inherited

Question 2

How can bacteria bedome become anti biotic reistant

Answer 2

Bacteria can develop random mutations.These can lead to bacteria becoming resistant to a particular antibiotic

Question 3

Why is the problem of anti biotic resistance becoming more of a problem

Answer 3

Antibiotics are being overused
People aren’t using antibiotics correctly

Question 4

What is selective breeding

Answer 4

Humans choose which plants and animals are going to breed

Question 5

Organisms are selectively breed to develop features that are useful or attractive.Such as

Answer 5

Animals that produce milk or meat
Crops with dosease resistance
Dogs with good, gente personalities
Decorative plants with big or unusual flowers

Question 6

What does genertic engineering involve

Answer 6

Involves cutting a gene out of one organism and putting it into another organims cells

Question 7

Peocess of meiosis

Answer 7

1 - parent cell has chromosomes in pairs.Half from mother and half from father
2 - DNA in the parent cell is copied.Makes X shaled chromosomes
3 - Cells divides.Eqch new cell gets half of the chromosomes
4 - Each new cell divided again.X shaped chromomes chromosomes are pulled apart.End up with 4 gametes.