the results show that ( 1 ) in diploid cells the ribosomal ( r ) dna is present in amounts proportional to the number of nucleolus organizers , ( 2 ) in polytene cells the rdna is under-replicated with respect to the euchromatic dna , and ( 3 ) in polytene cells the amount of rdna is independent of the diploid number of nucleolus organizers .
C0012933
rdna
C0012854
dna