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[A]: Haemophillia is a genetically linke...

[A]: Haemophillia is a genetically linked disease.
[R]: The carrier gene is present on X chromosome of female

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

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The correct Answer is:
A
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[A]: Recombinant DNA contains DNA from two or more sources. [R]: Plasmids are small extra rings of DNA in bacteria that carry genes not present in the bacterial chromosome

[A]: The sex linked genes are passed on to the grandson through the daughter. [R]: The Y chromosome of the grandson is received from the maternal grandfather

[A]: Genes confined to differential region of homologous chromosomes are called holandric genes. [R]: Genes confined to homologous region of Y chromosomes only are celled Holandric genes.

[A]: When RH positive male marries RH negative woman the situation can be seri- ous. [R]: Genes linked to homologous part of X and Y chromosome behaves as autosomal genes.

Why do all the gametes formed in human females have an X chromosome?

[A] : Centromere is concerned with splitting of chromosomes . [R] : Oxysome is present in centromere to split it .

TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: In paracentric inversions the centromere is outside the inverted ...

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  2. [A]: Polyploidy increases the tolerance of plants towards extreme clim...

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  3. [A]: Haemophillia is a genetically linked disease. [R]: The carrier...

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

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

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

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

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  8. [A]: Cenromere is the primary constriction on the metaphase chromosome...

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

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

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

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

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

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

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

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

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

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

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  19. [A]: Homology is the similarity between or- gans of same animal based ...

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

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