G-banding and chromosome condensation in the ant, Tapinoma nigerrimum.

Well-defined G-bands were obtained on metaphase chromosomes from Tapinoma nigerrimum using trypsin and warm 2 x SSC in sequence. The G-banded pattern allowed the identification of all chromosomes. Evidence for asynchronous condensation of the chromosomes of this species is provided. Different banding patterns were obtained when metaphase chromosomes were stained with DA/DAPI alone and with DA/DAPI after a standard G-banding procedure. The G-banding phenomenon is discussed using the result obtained.