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Essential English for Biology Students.doc
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VI. Give Russian equivalents to the following English terms:

English term

Russian equivalent

1

to produce specific desirable qualities

2

selective breeding

3

artificial selection

4

to sow seeds

5

pest resistance

6

genetically different plants

7

to be exposed to new diseases

8

have no resistance

9

to develop domestic and farm animals

10

genetically distinct strains

11

the mixing of alleles

12

the descendants of hybrids

13

to maintain sources of genetic diversity

14

future breeding programmes

VII. Find synonyms among the pool of words:

Pool of words

Synonyms

1)1.harvest /2.stock /3.crop /4.yield /5.strain /6.breed

2) 1.seed /2.vigour /3.strength /4.grain

3)1.retain /2.sow /3.decrease /4.keep /5.plant /6. reduce

4) 1.distinct /2.diversity /3.different /4.variety

VIII. Answer the following questions. Use all information given before:

  1. How long have humans been breeding animals and plants selectively to produce specific desirable qualities?

2. What does selective breeding mean?

3. What type of natural selection is artificial selection similar to?

4. Describe how wheat cultivation began.

5. What does inbreeding involve?

6. Why is inbreeding carried out?

7. What does outbreeding involve?

8. How is the offspring from outbreeding called?

9. What is called hybrid vigour?

IX. Match the sentence halves. Make complete sentences:

1.

Artificial selection is therefore similar to directional selection, in that selection pressure brings about

A.

to try and retain the desirable characters in future generations.

2.

In selective breeding, particular individuals are chosen and allowed

B.

closely related individuals which by chance, possess some desirable character.

3.

Inbreeding involves breeding between

C.

crossing individuals from genetically distinct strains.

4.

Inbreeding is carried out

D.

to breed, whereas others are prevented from breeding.

5.

Outbreeding involves

E.

a gradual change in the genotype of a group of organisms.

6.

If the parental stocks are pure breeding,

F.

the vigour decreases as the plant become more homozygous again.

7.

If the descendants of F1 hybrids are continually inbred,

G.

on the availability of genetically distinct animals and plants.

8.

Outbreeding depends

H.

the offspring are called F1 hybrids.

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