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Assertion :- Inbreeding is necessary if ...

Assertion :- Inbreeding is necessary if we want to evolve a pure line.
Reason :- Inbreeding exposes harmful recessive gene that are eliminated by selection .

A

If both Assertion & Reason are True & Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
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Study the four statements given below and answer the question which follow them. I) Inbreeding is necessary if we want to develop a pureline in animals II) inbreeding exposes harmful recessive genes that are eliminated by selection III) continuous inbreeding usually reduces fertility and productivity IV) inbreeding depression can be overcome by outcrossing How many of the above statements are correct?

Fill up the blanks in the following paragraph by selecting the correct option. Inbreeding increase ul(i) . This inbreeding is necessary if we want to evolve a ul(ii) in any animal. Inbreeding exposes harmful ul(iii) genes that are eliminated by selection.

Assertion : In breeding increases homozygosity exposing harmful recessive genes, some of which are eliminated by selection. Reason : Continued inbreeding reduces fertility and productivity.

(i) Why is inbreeding necessary ? Give two reasons. (ii) What does continued inbreeding lead to ?

Assertion : Inbreeding produces pureline. Reason : It causes homozygosity.

What strategy would you suggest if a person wants to evolve a pure line in an animal ?

Assertion :- Consaguineous mating results in inbreeding depression. Reason :-

Selection will not eliminate a lethal recessive gene from a large population because

Assertion : Loss of vigour called inbreeding depression occurs when inbreeding is continued for many generations. Reason : Quarantine can be done to overcome the harmful effects of inbreeding depression.