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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 science dealing with study of inheritance and variation is
  2. When two genes are situated very close to each other in a chromosome
  3. In humans, an example of sex-linked trait is
  4. Colour blindness is caused due to
  5. Dyad is
  6. The chromosomal theroy of heredity implies that
  7. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  8. The condition in which only one allele of a pair is present is known as
  9. Down's syndrome is an example of
  10.  A chemical mutagen is
  11. Base substitutions from base analogues I are called
  12. Crossing over in meiosis occurs in
  13. Mutations which are not dominant are not lost by a gene pooL This is known as
  14. The term 'meiosis' was coined bv
  15. Linkage is
  16. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  17. When is the sex of an offspring decided
  18. Exhibition of superiority by a hybrid over both of its parents is called
  19. The number of characters investigated by Mendel was
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. DNA duplication occurs in
  22. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  23. Among the following which is a test cross?
  24. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  25.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  26. How many meiosis will be required to produce 102 pollen-grains ?
  27. Which one of the following chemical characteristics is not common to all living beings ?
  28. The nuclear membrane completely disappears during
  29. If an individual does not breed true for its characters, it is called
  30. The scientists who rediscovered the Mendel's laws are