Crossing over in meiosis occurs in

A. leptotene

B. pachytene

C. diplotene

D. diakinesis

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  1. When is the sex of an offspring decided
  2. If an individual does not breed true for its characters, it is called
  3. Diakinesis is characterised by
  4. Which one of the following chemical characteristics is not common to all living beings ?
  5. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  6. Exhibition of superiority by a hybrid over both of its parents is called
  7. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  8.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  9. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  10. The first person to induce mutations was
  11. Klinefelter's syndrome is developed when the chromosome in male is
  12. The nuclear membrane completely disappears during
  13. Down's syndrome is an example of
  14. Which disease results from the genetic inability to synthesize a single enzyme ?
  15. Chromosomes exhibit minimum coiling during
  16. Base substitutions from base analogues I are called
  17. Albinism in com plants is best described as
  18. Crossing over in meiosis occurs in
  19. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  20. The best method to determine whether an individual is homozygous or heterozygous is
  21. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  22. The condition in which only one allele of a pair is present is known as
  23. In a monohybrid cross the Fi ratio of a backcross is
  24. Linked genes may be separated by the process of
  25. DNA duplication occurs in
  26. The number of characters investigated by Mendel was
  27. The segment of DNA which participates in crossing over is known as
  28. How many meiosis will be required to produce 102 pollen-grains ?
  29. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  30. The chromosomal theroy of heredity implies that