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Crossing over in meiosis occurs in

A. leptotene

B. pachytene

C. diplotene

D. diakinesis

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  1. The number of characters investigated by Mendel was
  2. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  3. Exhibition of superiority by a hybrid over both of its parents is called
  4. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  5. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  6. The genetic constitution of an organism is known as
  7. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  8. The term 'meiosis' was coined bv
  9. Klinefelter's syndrome is developed when the chromosome in male is
  10. Colour blindness is caused due to
  11. The first person to induce mutations was
  12. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  13. Mutations which are not dominant are not lost by a gene pooL This is known as
  14. Lethal genes are those which
  15. The best method to determine whether an individual is homozygous or heterozygous is
  16. In a monohybrid cross the Fi ratio of a backcross is
  17. DNA duplication occurs in
  18. When two genes are situated very close to each other in a chromosome
  19. If an individual does not breed true for its characters, it is called
  20. In humans, an example of sex-linked trait is
  21. Which disease results from the genetic inability to synthesize a single enzyme ?
  22. Linked genes may be separated by the process of
  23. Linkage is
  24. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  25. Base substitutions from base analogues I are called
  26. Dyad is
  27. Albinism in com plants is best described as
  28. The segment of DNA which participates in crossing over is known as
  29. The nuclear membrane completely disappears during
  30. Diakinesis is characterised by