3.1.3 Selective Breeding Flashcards

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1
Q

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

A

Selective Breeding OR Artificial Selection

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2
Q

Another name for a feature is a…

A

characteristic

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3
Q

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

A

Lots of milk
Lots of meat
Disease resistant
Fast growth

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4
Q

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

A

Lots of strawberries

Large strawberries

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5
Q

Describe the process of selective breeding.

A
  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.
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6
Q

What is the main disadvantage of selective breeding?

A

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.

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7
Q

What is meant by variation between organisms?

A

Differences between organisms.

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8
Q

Describe the advantages of selectively breeding dogs

A

Faster
Stronger
Better appearance

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9
Q

Describe the disadvantages of selectively breeding dogs

A

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

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10
Q

Inbreeding in pedigree dogs results in…

A

a lower life expectancy compared to cross bred dogs.

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11
Q

What is a pedigree dog?

A

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

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