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DNA duplication occurs in

A. meiosis only

B. meiosis II and mitosis

C. mitosis only

D. meiosis I and mitosis

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  1. The first person to induce mutations was
  2. Which one of the following chemical characteristics is not common to all living beings ?
  3. The condition in which only one allele of a pair is present is known as
  4. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  5. Mutations which are not dominant are not lost by a gene pooL This is known as
  6. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  7. Reverse transcription was discovered by
  8. How many meiosis will be required to produce 102 pollen-grains ?
  9. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  10. If an individual does not breed true for its characters, it is called
  11. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  12. Lethal genes are those which
  13. A codon is a sequence of 3 nucleolides on
  14. Klinefelter's syndrome is developed when the chromosome in male is
  15. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  16. In a monohybrid cross the Fi ratio of a backcross is
  17. Exhibition of superiority by a hybrid over both of its parents is called
  18. The nuclear membrane completely disappears during
  19. When two genes are situated very close to each other in a chromosome
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. Dyad is
  22. Crossing over in meiosis occurs in
  23. Albinism in com plants is best described as
  24.  A chemical mutagen is
  25. DNA duplication occurs in
  26. The segment of DNA which participates in crossing over is known as
  27. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  28. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  29. The genetic constitution of an organism is known as
  30. The science dealing with study of inheritance and variation is