Hairless, also known as H, is a well-characterized Drosophila gene. Since Hairless is a dominant loss of function mutation, many mutations to Hairless are embryonic lethal, but there are several viable hairless mutants. This specific Drosophila gene is involved in the Notch signaling pathway (NSP) by acting as a suppressor of the organism's Notch signaling. This interaction of the NSP can be seen in Figure 1.