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 A chemical mutagen is

A. X-rays

B. UV-rays

C. β-rays

D. 5-Bromo-Uracil

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  1. The term 'meiosis' was coined bv
  2. How many meiosis will be required to produce 102 pollen-grains ?
  3.  A chemical mutagen is
  4. Colour blindness is caused due to
  5. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  6. When is the sex of an offspring decided
  7. If an individual does not breed true for its characters, it is called
  8. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  9. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  10. Diakinesis is characterised by
  11. The first person to induce mutations was
  12. Transfer of a gene or genes through a virus is called
  13. Base substitutions from base analogues I are called
  14. Chromosomes exhibit minimum coiling during
  15. Down's syndrome is an example of
  16. The scientists who rediscovered the Mendel's laws are
  17. DNA duplication occurs in
  18. A codon is a sequence of 3 nucleolides on
  19. The segment of DNA which participates in crossing over is known as
  20.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  21. Albinism in com plants is best described as
  22. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  23. The number of characters investigated by Mendel was
  24. Which one of the following chemical characteristics is not common to all living beings ?
  25. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  26. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  27. Reverse transcription was discovered by
  28. The nuclear membrane completely disappears during
  29. The genetic constitution of an organism is known as
  30. In humans, an example of sex-linked trait is