Selective Breeding – Check Test

1. Choosing animals with better qualities and using them for

mating is called

A hybridisation.

B selective breeding.

C natural selection.

D true breeding.

2. Which of the following animals has not been

selectively bred?

A Whale

B Pig

C Goat

D Horse

3. Which animal and characteristic from the following has

been improved by selective breeding?

A Sheep and length of tail.

B Bull and Milk production.

C Cow and size of head.

D Pig and litter size.

4. In the selective breeding of plants, hybridisation

involves

A self – fertilising different varieties.

B cross – fertilising different varieties.

C self – fertilising the same varieties.

D cross – fertilising the same varieties.

5. One problem with selective breeding is that

A improvements are never made.

B hybrids are always superior.

C inbred lines show advantages.

D fertilisation is not guaranteed.

6. In selective breeding

A offspring are always improved.

B improvements can be gained very quickly.

C there is a limitation to improvements.

D improvements are unlimited.

7. The selective breeding of rice will not produce a

drought resistant variety if

A the required gene is only present in some individuals.

B only cross – fertilisation is used.

C the required gene is not present in the species.

D the appropriate environment is not available.

8. The reason that inbred lines may show disadvantages

is that

A there is an increase in the frequency of recessive genes.

B there are more genes in the offspring than in the parents.

C the parents selected for breeding are already inferior.

D inbreeding results in genes being lost when mating occurs.