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[A]: Copy choice theory for crossing ove...

[A]: Copy choice theory for crossing over was proposed by Belling.
[R]: According to this theory, paired chromosomes in Meiosis I, duplicate their genes before the development of fibres that join them in tandem.

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:
B
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TRUEMAN BIOLOGY-Genetics-ASSERTION AND REASON
  1. [A]: Genes confined to differential region of homologous chromosomes a...

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  2. [A]: Chromosomes appear longer during telophase. [R]: The term chro...

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  3. [A]: Copy choice theory for crossing over was proposed by Belling. ...

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  4. [A]: Kornberg and Ochoa got Nobel Prize in the field of genetics. [...

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  5. Consider the following statements : Assertion (A) : Amber codon is a...

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  6. [A): DNA replicates after mitosis. [R]: In mitosis, the chromosomal...

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  7. [A]: DNA code is copied in the synthesis of tRNA. [R]: tRNA moves o...

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  8. [A]: DNA is associated with proteins. [R]: DNA wound around histone ...

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  9. [A]: Translocation involves transfer of genetic material between homol...

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  10. Assertion : Left-handed DNA is known as B-DNA. Reason : Right - han...

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  11. [A]: Meselson and Stahl tested the Watson and Crick Theory of DNA repl...

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  12. Assertion (A) : Adenine cannot pair with cytosine. Reason ® : Becaus...

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  13. Assertion : DNA is associated with proteins. Reason : DNA binds aro...

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  14. Assertion. The genetic code is degenerate. Reason. Most amino acids ...

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  15. Assertion: A non-overlapping code means that a base in mRNA is not us...

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  16. [A]: Recombinant DNA contains DNA from two or more sources. [R]: Pl...

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  17. [A]: Genetic engineering is the use of tech- nology to alter the genom...

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  18. [A]: The Lac operon is an example of inducible system. [R]: When Lac...

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  19. [A]: Vectors carry only the foreign DNA/gene into the host cell. [R]...

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  20. [A]: The series of enzyme controlled reactions determine traits in an ...

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