Standard Grade Biology

Inheritance TopicSelective Breeding

2

Inheritance

By the end of this lesson you should be able to:

•Describe what selective breeding is.•Explain why selective breeding is useful

to humans•Describe one example in plants &

one in animals

3

Selective Breeding

Farmers are always trying to improve their livestock or crops.

Dairy farmers want to have a herd of cows that produce large quantities of milk

4

Selective Breeding

Which two cows will the farmer choose to be the parents, if he wants a calf that produces high quality milk?

5

Selective Breeding

Beef farmers want to breed cattle that are heavy.

This should mean that there is as much meat as possible for sale.

6

Selective Breeding

The beef farmer would also have to consider the quality of the meat.

7

Selective Breeding

What quality would be important to sheep farmers?

8

Selective Breeding

What quality would be important to farmers of cereal crops?

9

Selective Breeding

All domestic dogs are bred from wild dogs.

10

Selective Breeding

What qualities would the parent dogs have to produce a husky?

11

Selective Breeding

What qualities would the parent dogs have to produce a poodle?

12

Selective Breeding

What is the original parent of all these plants?

13

Selective Breeding

In your jotter write down what selective breeding is.

Describe an example of selective breeding in

Animals Plants

14

Inheritance

Ask your teacher for the “Oil Content in Maize” Problem Solving Sheet.

Answer Q1-5 in your jotter.

15

Inheritance

Can you do it?

•Describe what selective breeding is.•Explain why selective breeding is useful

to humans•Describe one example in plants &

one in animals