Breeds And Varieties

Question 1

What is artificial selection?

Answer 1

When humans choose certain organisms because they have useful characteristics

Question 2

What is selective breeding?

Answer 2

When humans choose an organist hat has a certain characteristic and breed more of these organisms, making THE CHOSEN CHARACTERISTIC MORE OBVIOUS.

Question 3

What is genetic engineering?

Answer 3

Altering the genome of an organism, usually be adding end from another organism.

Question 4

List at least 2 things plants and animals are selectively bred for.

Answer 4

Any 2 from:

• disease resistance
• yield
• coping with certain conditions
• fast growth
• taste

Question 5

What is an organism that has undergone genetic engineering called?

Answer 5

GMO (genetically modified organisms)

Question 6

List some advantages of selective breeding.

Answer 6

• New varieties may be more economically important- produce more or better quality food
• Animals that don’t cause harm can be produced (eg: cattle without horns)

Question 7

List some disadvantages of selective breeding.

Answer 7

• Could get rid of useful characteristics for future conditions
• Animal welfare concerns
• Huge Numbers of some variety/breed are all susceptible to same diseases

Question 8

List some advantages of genetic engineering

Answer 8

• Cna improve diet of those in poorer countries (eg: Golden Rice- vitamin A)
• Human insulin produced for diabetics

Question 9

List some disadvantages of genetic engineering

Answer 9

• Seeds for many GM crops are expensive
• Some diabetics can’t use insulin from GM bacteria
• Irreversible effects
• May pass on resistance to herbicides
• No evidence to support that food is bad for health