| molecular relationships between alcohol dehydrogenase null-activity alleles from natural populations of drosophila melanogaster. | alcohol dehydrogenase null-activity alleles extracted from a number of natural populations of drosophila melanogaster in tasmania were shown to be molecularly similar by probing, with an oligonucleotide specific to an inserted region in intron 2 of the gene, genomic dna amplified by the polymerase chain reaction. this insertion had previously been shown to be the cause of the loss of activity in one of the null alleles whose dna sequence was known. three adh null alleles from mainland population ... | 1992 | 1560761 |