The Hedgehog (Hh) pathway is activated in follicle stem cells of animals lacking boi (CIL# 13757), relative to wild-type Drosophila (this image), based on activated cubitus interruptus (ci) staining (...

boi controls follicle stem cell proliferation. Germaria from boi[e] mutant in which germ cells (blue, anti-Vasa) and differentiating follicle cells (red, anti-Fas3) are labeled. Stalks between the ger...

Boi (green) and Hedgehog (Hh, red) are expressed in apical cells of the Drosophila wild-type germarium (CIL# 13744). In the absence of boi (boi[e] mutant), Hh is redistributed from apical cells to the...

Lilium longiflorum (Easter Lily) pollen. This is a thin optical section through the center of the desiccated stage of the mature pollen showing autofluorescence or harmonic generation of intrinsic st...

Transmission electron micrograph of a cross section through the nucleolus from a Chinese hamster spermatogonium revealing a complex distribution of regions of varying granular textures.

Transmission electron micrographs showing chromosomes in dividing spermatogonia during metaphase in tissue from ram testis (upper panel) and as they begin to separate during early anaphase in tissue f...

This confocal image shows a 13.5 days post coitum female mouse gonad at high magnification (x40). The developing ovary and mesonephros were fluoresently stained with an endothelial and germ cell marke...

Time series of meiosis I, starting at metaphase, in primary spermatocytes of the crane-fly Nephrotoma suturalis that have been experimentally flattened. Time-lapse polarization microscopy using a Nik...

Fluorescent micrograph of a Drosophila melanogaster reproductive system highlighting the muscular and neural structure fruitfly ovaries and uterus. The background staining of the eggs in red is a spe...

Colorized scanning electron micrograph of an eggshell collected at 3900X magnification.