Abstract: The research work was conducted to study the behaviour of dark and light neurones in the geniculate ganglion during development and growth in chick, The dark and light cells are differentiated in each group according to the intensity of cytoplasmic stain. The tiny cells are newly formed cells that are considered as very young and the most active ones, and they are always dark. Cell death (apoptosis) is most prominent and common among the small and medium sized ones. Probably it is during these stages of cell-growth during development, the peripheral and central processes (of axons) begin to grow from the cell body and attempt to get established in their projection fields. If they succeed in their attempt, they continue to function and remain as dark cells, but if they fail they lose their activity, tend to die and disappear, and change into light coloured cell on staining. The light cells have appeared among the very-small cells for the first time just on the day of hatching. This could signify the possible attempt to eliminate the growing cells since they no longer needed to replace larger categories of cells which have already developed functional connections at this stage while the animal is prepared for an independent living. Usually the light cells are reduced very much in number on E18 indicating probably a stage of faster and active removal of inactive and dead cells by the tremendously increased phagocytic cells. The light cell stage becomes clearly observable only when the phagocytic process is slow and becomes prominent at a time when some of the important connections are being actively established. It is assumed that the appearance of light cells might be indicative to the onset of establishment of functional connections of the neurones.