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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. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  3. The scientists who rediscovered the Mendel's laws are
  4. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  5.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  6. Diakinesis is characterised by
  7. In humans, an example of sex-linked trait is
  8. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  9. Albinism in com plants is best described as
  10. The term 'meiosis' was coined bv
  11. Down's syndrome is an example of
  12. The nuclear membrane completely disappears during
  13. If an individual does not breed true for its characters, it is called
  14. The chromosomal theroy of heredity implies that
  15. Dyad is
  16. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  17. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  18. When two genes are situated very close to each other in a chromosome
  19. The first person to induce mutations was
  20. The condition in which only one allele of a pair is present is known as
  21. A codon is a sequence of 3 nucleolides on
  22. How many meiosis will be required to produce 102 pollen-grains ?
  23. Crossing over in meiosis occurs in
  24. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  25. Chromosomes exhibit minimum coiling during
  26. Among the following which is a test cross?
  27. Exhibition of superiority by a hybrid over both of its parents is called
  28. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  29. Linked genes may be separated by the process of
  30.  A chemical mutagen is