Actually, mandarin passion are pigeon based which is caused by a dominant mutation. The MP also carry a dominant mutation which causes the lack of pattern. In addition the blue diamond carries the recessive BD gene. So 3 mutated genes in this one. The 2 doms will determine the overall look. If the pigeon gene is homozygous, then all the fry will be pigeons. If not, and we get throwbacks to brown based fry, then we are dealing with a heterozygous gene. Same with the no pattern gene, either some, or all will carry this trait. The solid pattern of the blue diamond will recede leaving a more typical wild type pattern, but only if the no stripe gene is heterozygous. If the no stripe gene is in pure form, then no proper pattern will form on them at all.
So the range of results could include mandarin passion type, marlbro type, pattern pigeon type, brown based turk varieties, rose red types and regular brown based wild types. Pepper could be an issue on the pigeons!