Someone understands? http://www.birdfarm.bravepages.com/moregenex.html India blue Pied X Black Shoulder ..... BBTP X bb why not BBTP X BBbb ... ? India blue Pied = TB BP = 1 gene white ( T ) + 1 gene pied ( P ) + 2 genes blue ( B ) .... OK ! Black Shoulder = 2 X Ib ..... NO colour ? or here I is the blue gene ? There is a gene BLUE of Blue PATTERN ( I ) and a gene BLUE of Blue COLOR ( B ) ! I = Male IB wild barring pattern ? Then, we are going to mate brother and sister The genetic profile of a bird has 4 letters ... why here 8 letters?