Selective Breeding

Question 1

What is selective breeding?

Answer 1

When humans breed plants and animals for specific genetic characteristics.

Question 2

All breeds of horse are of the same species.
Suggest what you could do to show this. (2)

________________ different breeds of horse.

If the offspring are __________, the two breeds are ______________________.

Answer 2

Cross breed

fertile
of the same species

Question 3

Describe the steps involved in selective breeding to produce a racehorse. (3)

Select the _____________________ to mate.

Then select the _____________________ and ________ them.

Then repeat over ______________________ to breed faster horses.

Answer 3

fastest male and female

fastest offspring
breed

several generations

Question 4

What are 2 reasons people might selectively breed cats? (2)
1.
2,

Answer 4

1. For aesthetic reasons.
2. So that they do not have any genetic defects.

Question 5

Future generations of selectively bred offspring will all share very similar genes which will reduce _______________.

Answer 5

variation

Question 6

What is genetic variation?

Answer 6

Differences in DNA among individuals of the same species.

Question 7

What is a gene pool?

Answer 7

All the genes and their different alleles within a population.

Question 8

Inbreeding can lead to a ____________________.

making it more difficult to produce _______________ in the future and make organisms prone to _____________ or _________________.

Answer 8

reduced gene pool

new varieties
certain diseases
inherited defects

Question 9

Describe one problem of inbreeding.

Answer 9

More likely to be susceptible to diseases.