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Selective BreedingAIM: be able to explain how selective breeding is carried out

to produce new varieties of plant.

TASK: How many differentgroups can you make from the

following plants and animals.

How many ways can you make

the groups overlap?

Working animals

Plants and

animals used for 

food

Sheep can be both!

corn, wheat, rose, sheep,duck, goose, tomato,cabbage, rye, racehorse,cart horse, pit pony,alsatian, labrador,sheepdog, St Bernarddog, apple, seedlessgrape, hemp, fast-growing

conifer tree, strawberry,farmed trout, farmedsalmon, wild trout, wildsalmon

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Why are there so many different varieties of 

apples?

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Romaine

Iceberg

Oak leaf 

Common round

lettuce

Why are

there somany

different

varieties of 

lettuce?

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Selective BreedingWhat do these three have in common with this

one?

belgian blue to 3:17

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S_______  b _______ is a process used to producedifferent breeds of animals or varieties of plants thathave useful c ____________ .

Farmers can c_____ individual

cows to mate to produce cowsthat will yield more m____.

Apple growers can cross a variety of apple

known for taste with another variety thatshows strong resistance to d_____.

What is selective breeding?

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Tasks

1. For each of the following organisms list the features that

might be selectively bred for:

Cattle

Sheep

Horses

 Apple trees

2. Read pages 50 and 51, answer the questions in full

sentences.

3. Imagine that you want to breed the perfect animal or plant.

What would it be? Produce a billboard advert for your new

breed.

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T rue or false?

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Pollination in plants

Write a set of instructions which could be given to a plant

breeder to explain how 

to sele

ctiv 

elybreed

 thei

r pla

n

ts.Explain how: pollen from one flower can be used to pollinate anotherflower;to ensure that there is no contamination with pollen from

other flowers.