i - domin ant " ▁or ▁incomplete ▁dominant ▁model . ▁Ad al stein sson ▁also ▁noted ▁that ▁in ▁heter o zy g otes , ▁only ▁the ▁red ▁p ig ment ▁( phe om el an in ) ▁was ▁dil uted . ▁▁ ▁The ▁discovery ▁that ▁the ▁pal om ino ▁coat ▁color ▁was ▁in ext ric ably ▁linked ▁to ▁the ▁cre am ▁coat ▁color ▁was ▁very ▁significant . ▁ ▁At ▁one ▁time , ▁double ▁dil utes , ▁particularly ▁cre m ell os , ▁were ▁bar red ▁from ▁registration ▁by ▁many ▁bre ed ▁organizations . ▁ ▁C rem ello ▁was ▁thought ▁by ▁some ▁to ▁be ▁a ▁le th al ▁white ▁or ▁alb ino ▁color ing ▁and ▁a ▁potential ▁gen etic ▁defect . ▁ ▁There ▁also ▁were ▁known ▁health ▁imp lications ▁of ▁al bin ism ▁in ▁humans , ▁and ▁cultural ▁pre jud ices ; ▁while ▁a ▁hero ic ▁figure ▁such ▁as ▁Roy ▁Rog ers ▁rode ▁a ▁golden ▁pal om ino , ▁the ▁" Al b ino " ▁in ▁Mary ▁O ' H ara ' s ▁Th under head ▁port rayed ▁a ▁horse ▁with ▁a ▁fre ak ish ▁defect . ▁These ▁coat ▁colors ▁carried ▁vast ly ▁different ▁cultural ▁significance . ▁Because ▁the ▁experience ▁of ▁bre ed ers ▁of ▁pal om ino ▁and ▁bu ck sk in ▁horses ▁indicated ▁that ▁blue - ey ed ▁cre am ▁off spring ▁of ▁these ▁animals ▁were ▁not ▁gen et ically ▁defect ive , ▁ ▁some ▁of ▁the ▁research ▁that ▁took ▁place ▁nearly ▁thirty ▁years ▁after ▁Ad al stein sson ' s ▁studies