HVEM image of thick section of a polytene chromosome from the fat bodyof 3rd instar larvae of Drosophila melanogaster showing the organization into bands and interbands characteristic of polytene chro...

Salivary glands from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin and stained with uranyl acetate, embedded in epoxy resin, and 0.5 micrometer sections prepared (se...

Intestines from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin-acetic acid containing 0.1% Triton-X 100, and squashed on a glass slide. After freezing in liquid nitro...

High Voltage (1MeV) TEM image of a squash preparation of polytene chromosomes from salivary gland of 3rd instar larva of Drosophila melanogaster showing the band-interband organization.

High Voltage (1MeV) TEM image of a 'thick' section of polytene chromosome from salivary gland of 3rd instar larva of Drosophila melanogaster showing the band-interband organization. This image was cap...

Fat bodies from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin and stained with uranyl acetate, embedded in epoxy resin, and 0.5 micrometer sections prepared (see Ris...

HVEM image of thick section of a polytene chromosome from the fat bodyof 3rd instar larvae of Drosophila melanogaster showing the organization into bands and interbands characteristic of polytene chro...

Salivary glands from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin and stained with uranyl acetate, embedded in epoxy resin, and 0.5 micrometer sections prepared (se...

Salivary glands from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin and stained with uranyl acetate, embedded in epoxy resin, and 0.25 micrometer sections prepared (s...

Salivary glands from 3rd instar larvae of Drosophila melanogaster were dissected, fixed with formalin and stained with uranyl acetate, embedded in epoxy resin, and 0.5 micrometer sections prepared (se...