Open AccessElectron microscopic analysis of the banding pattern in the salivary gland chromosomes of Drosophila melanogaster. Divisions 6 through 10 of X
Author(s) -
SORSA VEIKKO,
SAURA ANJA O.,
HEINO TAPIO I.
Publication year - 1983
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1983.tb00593.x
Subject(s) - electron micrographs , biology , drosophila melanogaster , melanogaster , salivary gland , electron microscope , electron , drosophila (subgenus) , evolutionary biology , anatomy , genetics , optics , physics , gene , biochemistry , quantum mechanics
An electron microscopic analysis of thin sections of squashed salivary gland chromosomes of Drosophila melanogaster shows a total of 295 bands for the divisions 6 through 10 of X. The number is in good agreement with the one dzpicted by B ridges in the revised reference map for these divisions. Only 60 of the one hundred double bands drawn by B ridges can be interpreted to be doublets also in the electron micrographs. Twenty‐two of B ridges ' doublets seem to be singlets, and the remaining 18 of Bridges' double bands are made up of two separate single bands with a distinct interband in between. A total of 23 new, in general very faint bands have been detected in the electron micrographs of divisions 6 through 10 of X. Some problems related to the structural and functional organization of chromomeres were discussed.