▁wings , ▁which ▁do ▁not ▁stretch ▁beyond ▁their ▁body ▁and , ▁thus , ▁are ▁not ably ▁shorter ▁than ▁the ▁wild - type ▁length . ▁He ▁also ▁noted ▁its ▁inheritance ▁is ▁connected ▁to ▁the ▁sex ▁of ▁the ▁fly ▁and ▁could ▁be ▁pa ired ▁with ▁the ▁inheritance ▁of ▁other ▁sex - det erm ined ▁tra its ▁such ▁as ▁white ▁eyes . ▁The ▁wings ▁may ▁also ▁demonstrate ▁other ▁characteristics ▁devi ant ▁from ▁the ▁wild - type ▁wing , ▁such ▁as ▁a ▁d ull er ▁and ▁cloud ier ▁color . ▁M ini ature ▁wings ▁are ▁ 1 . 5 x ▁shorter ▁than ▁wild - type ▁but ▁are ▁believed ▁to ▁have ▁the ▁same ▁number ▁of ▁cells . ▁This ▁is ▁due ▁to ▁the ▁lack ▁of ▁complete ▁fl atten ing ▁by ▁these ▁cells , ▁making ▁the ▁overall ▁structure ▁of ▁the ▁wing ▁seem ▁shorter ▁in ▁comparison . ▁The ▁path way ▁of ▁wing ▁expansion ▁is ▁reg ulated ▁by ▁a ▁signal - re ceptor ▁path way , ▁where ▁the ▁ne uro h orm one ▁b urs icon ▁interact s ▁with ▁its ▁complement ary ▁G ▁protein - cou ple d ▁re ceptor ; ▁this ▁re ceptor ▁drives ▁one ▁of ▁the ▁G - prote in ▁sub un its ▁to ▁signal ▁further ▁en zym e ▁activity ▁and ▁results ▁in ▁development ▁in ▁the ▁wing , ▁such ▁as ▁apo pt osis ▁and ▁growth . ▁se : ▁sep ia - ▁The ▁sep ia ▁eye ▁color ▁is ▁brown . ▁O mm och rom es [ b rown ] ▁and ▁d ros opter ins [ red ] ▁are ▁responsible ▁for ▁the