▁two ▁copies ▁are ▁present , ▁a ▁horse ▁will ▁be ▁blue - ey ed ▁in ▁addition ▁to ▁a ▁light ▁coat ▁color . ▁▁▁ ▁The ▁cre am ▁gene ▁is ▁one ▁of ▁several ▁hyp om el an ism ▁or ▁dil ution ▁gen es ▁identified ▁in ▁horses . ▁ ▁Therefore , ▁it ▁is ▁not ▁always ▁possible ▁to ▁tell ▁by ▁color ▁alone ▁whether ▁the ▁CC r ▁alle le ▁is ▁present ▁without ▁a ▁DNA ▁test . ▁ ▁Other ▁dil ution ▁gen es ▁that ▁may ▁m im ic ▁some ▁of ▁the ▁effects ▁of ▁the ▁cre am ▁gene ▁in ▁either ▁single ▁or ▁double ▁copies ▁include ▁the ▁p ear l ▁gene , ▁silver ▁d apple ▁gene , ▁and ▁the ▁champ agne ▁gene . ▁ ▁H ors es ▁with ▁the ▁d un ▁gene ▁also ▁may ▁m im ic ▁a ▁single ▁copy ▁of ▁the ▁cre am ▁gene . ▁ ▁To ▁comp licate ▁matters ▁further , ▁it ▁is ▁possible ▁for ▁a ▁horse ▁to ▁carry ▁more ▁than ▁one ▁type ▁of ▁dil ution ▁gene , ▁sometimes ▁giving ▁rise ▁to ▁color ing ▁that ▁research ers ▁call ▁a ▁pseudo ▁double ▁dil ute . ▁ ▁The ▁discovery ▁of ▁the ▁cre am ▁gene ▁had ▁a ▁significant ▁effect ▁on ▁bre eding , ▁allowing ▁hom o zy g ous ▁blue - ey ed ▁cre ams ▁to ▁be ▁recognized ▁by ▁many ▁bre ed ▁reg ist ries ▁that ▁had ▁previously ▁registered ▁pal omin os ▁but ▁b anned ▁cre m ell os , ▁under ▁the ▁mistaken ▁notion ▁that ▁hom o zy g ous ▁cre am ▁was ▁a ▁form ▁of ▁Al bin ism . ▁ ▁Colors ▁produced