3.1.3 Selective Breeding Flashcards Preview

SHHS - Science - B3.1 New Technology - Year 9 > 3.1.3 Selective Breeding > Flashcards

Flashcards in 3.1.3 Selective Breeding Deck (11)
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1

What do we call it when a farmer chooses which animals to breed?

Selective Breeding OR Artificial Selection

2

Another name for a feature is a...

characteristic

3

Which characteristics might a farmer want to selectively breed into his cattle (cows)?

Lots of milk
Lots of meat
Disease resistant
Fast growth

4

Which characteristics might a farmer want to selectively breed into his strawberries?

Lots of strawberries
Large strawberries

5

Describe the process of selective breeding.

1. Decide which characteristics are important.
2. Select parents that have this characteristic.
3. Breed these individuals.
4. Select the best offspring and breed them again.
5. Repeat for many generations.

6

What is the main disadvantage of selective breeding?

You make all of the organisms pass on the same genes so you lose variation in a species.
Increase the chances of the species being wiped out by disease.

7

What is meant by variation between organisms?

Differences between organisms.

8

Describe the advantages of selectively breeding dogs

Faster
Stronger
Better appearance

9

Describe the disadvantages of selectively breeding dogs

Health problems e.g. Labradors have hip problems, Pugs have breathing problems.

10

Inbreeding in pedigree dogs results in...

a lower life expectancy compared to cross bred dogs.

11

What is a pedigree dog?

A dog that is bred to have the best characteristics for its breed e.g. Labrador, Pug etc.