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A codon is a sequence of 3 nucleolides on

A. t-RNA

B. m-RNA

C. s-RNA

D. hn-RNA

Correct Answer : B.


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  1. Dyad is
  2. When two genes are situated very close to each other in a chromosome
  3. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  4. Diakinesis is characterised by
  5. Chromosomes exhibit minimum coiling during
  6. The science dealing with study of inheritance and variation is
  7. Mutations which are not dominant are not lost by a gene pooL This is known as
  8. Among the following which is a test cross?
  9. The condition in which only one allele of a pair is present is known as
  10. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  11. Which disease results from the genetic inability to synthesize a single enzyme ?
  12. The scientists who rediscovered the Mendel's laws are
  13. Crossing over in meiosis occurs in
  14. When is the sex of an offspring decided
  15.  A chemical mutagen is
  16. Linkage is
  17. The first person to induce mutations was
  18. In humans, an example of sex-linked trait is
  19. Base substitutions from base analogues I are called
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. Reverse transcription was discovered by
  22. Exhibition of superiority by a hybrid over both of its parents is called
  23. The segment of DNA which participates in crossing over is known as
  24. Albinism in com plants is best described as
  25. The chromosomal theroy of heredity implies that
  26. In a monohybrid cross the Fi ratio of a backcross is
  27. The term 'meiosis' was coined bv
  28. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  29. Lethal genes are those which
  30. The nuclear membrane completely disappears during