SYMBOLS of alleles:
M - the presence of melanin (black pigment)
G - the presence of guanine (сonditionally blue pigment)
E - the presence of astaksantin (red pigment)
X - the presence of lutein (yellow piment)
m -the lack or reduction of melanin quantity (black pigment)
g - the lack or reduction of guanine quantity (сonditionally blue pigment)
e - the lack or reduction of astaksantina quantity (red pigment)
x - the lack or reduction of lutein quantity (yellow piment)
There is a table (in addition to earlier), which clearly shows the correlation between the number ment of pigment cells, the size of pigment granules in these cells and the number of recessive and dominant alleles of genes in the color genotype.
Two basic rules:
1. Recessive alleles of each gene reduces the amount of color pigment granules, which are coded by the formation of these same genes, and the phenotype of color almost does not occur.
Ie if the genotype, for example, mm GG EE XX, it reduces the size of granules of melanin in melanofores and the fish is not a black and gray, in any color - as well as Base body colors as Secondary sex colors.
2. The more recessive alleles of genes in the color genotype, the smaller the quantity of pigment cells.
Thus, the ratio of dominant and recessive alleles of 4 genes leads to the appearance of all possible phenotypes in Base body colors and Secondary sex colors.