Tizo and Levan's contribution is very significant because they

  • [AIPMT 1993]
  • A

    Gave the number of human chromosomes

  • B

    Pointed out mutational changes

  • C

    Identified Barr bodies

  • D

    Detected sex linkage

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Pleotropic character represent that quality of gene which is called

Sugars are attached to the pyrimidines by the formation of

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Histone occupies the major grooves of $DNA$ at an angle of

  • [AIPMT 2002]

Nucleoid is present in