Detailed genotype hexagon (dG-hex) describing the probability of having a certain genotype in offspring after a parental cross. Solid lines in the outer hexagon between two rhombuses (parent with either sex) represent marriage for autosomal inheritance. Solid and dotted lines in the inner hexagon space between square (father) and circle (mother) represent marriage for X-linked and Y-linked inheritance, respectively. Genotype outcome in offspring are represented by ternary coded square along each marriage line. Wherever genotype code of both parents is different, two different writable crosses are possible so respective ternary coded square is represented along the relevant arrowhead. e.g., for a parental cross 0 x 1, the offspring outcomes are written along the arrow head near the parent 0 in the 0→1 direction.