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[A]: Cytoplasmic male sterility is obser...

[A]: Cytoplasmic male sterility is observed in maize.
[R]: The cytoplasmic male sterility in maize is due to interaction of cytoplasmic factors and male sterile gene

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
A
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TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Polyploidy increases the tolerance of plants towards extreme clim...

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  2. [A]: Haemophillia is a genetically linked dis- ease. [R]: The carri...

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  3. [A]: Cytoplasmic male sterility is observed in maize. [R]: The cyto...

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  4. Assertion: DNA synthesis occurs in G(1) and G(2) periods of cell cycle...

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  5. [A]: Sickle-cell anaemia is a genetically de- termined disorder affect...

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  6. [A]: The deleted region of long arm of chro- mosome 7 contains the ela...

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  7. [A]: Centromere is the primary constriction on the metaphase chromosom...

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  8. [A]: Dolly, a sheep is an example of cloning. [R]: Cloning in anoth...

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  9. Assertion (A) : Replication and transcription occur in the nucleus but...

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  10. [A]: Cycads were prevalent during Jurassic period. [R]: Jurassic pe...

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  11. [A]: Evolution is descent with modification. [R]: Evolution is der...

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  12. [A]: Isolation is a mechanism which prevents interbreeding among other...

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  13. [A]: Mesozoic era is known as the 'Age of Reptiles'. [R]: It was ...

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  14. [A]: Radioactive carbon ^(14)C method is quite accurate for relativel...

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  15. [A]: According to Hardy-Weinburg law both gene frequencies and genotyp...

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  16. [A]: 'Ontogeny recapitulates phylogeny' was the concept put forward by...

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  17. [A]: Vestigeal organs are those parts of the body which are greatly re...

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  18. [A]: Homology is the similarity between organs of same animal based on...

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  19. [A]: Ear muscles of external ear in man are well developed. [R]:...

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  20. [A]: Convergent evolution leads to production of analogous similaritie...

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