▁the ▁DNA ▁required ▁for ▁correct ▁development ▁of ▁the ▁wings . ▁w : ▁white - ▁D ros oph ila ▁mel an og aster ▁wild ▁type ▁typically ▁express es ▁a ▁brick ▁red ▁eye ▁color . ▁The ▁white ▁eye ▁mut ation ▁in ▁fruit ▁f lies ▁is ▁caused ▁due ▁to ▁the ▁absence ▁of ▁two ▁p ig ments ▁associated ▁with ▁red ▁and ▁brown ▁eye ▁colors ; ▁per id ines ▁( red ) ▁and ▁om m och rom es ▁( b rown ) ▁. ▁In ▁January ▁ 1 9 1 0 , ▁Thomas ▁H unt ▁Morgan ▁first ▁discovered ▁the ▁white ▁gene ▁and ▁denoted ▁it ▁as ▁w . ▁The ▁discovery ▁of ▁the ▁white - ey e ▁mut ation ▁by ▁Morgan ▁brought ▁about ▁the ▁beg inn ings ▁of ▁gen etic ▁experiment ation ▁and ▁analysis ▁of ▁D ros oph ila ▁mel an og aster . ▁H unt ▁eventually ▁discovered ▁that ▁the ▁gene ▁followed ▁a ▁similar ▁pattern ▁of ▁inheritance ▁related ▁to ▁the ▁me i otic ▁seg reg ation ▁of ▁the ▁X ▁chrom os ome . ▁He ▁discovered ▁that ▁the ▁gene ▁was ▁located ▁on ▁the ▁X ▁chrom os ome ▁with ▁this ▁information . ▁This ▁led ▁to ▁the ▁discovery ▁of ▁sex - link ed ▁gen es ▁and ▁also ▁to ▁the ▁discovery ▁of ▁other ▁mut ations ▁in ▁D ros oph ila ▁mel an og aster . ▁ ▁The ▁white - ey e ▁mut ation ▁leads ▁to ▁several ▁dis adv antages ▁in ▁f lies , ▁such ▁as ▁a ▁reduced ▁clim bing ▁ability , ▁short ened ▁life ▁span , ▁and ▁lower ed ▁resistance ▁to ▁stress ▁when ▁compared ▁to