Dark Factor

Dark Factor (Incomplete Dominant)

There are two different alleles for this gene. Dark factors are dominant to normal body color. Normal white base budgies are sky blue and normal yellow base budgies are lime green. If a white base bird is heterozygous (or single factor) for dark factor (only carrying one dark factor allele), it will be cobalt, if it's homozygous (or double factor) for dark factor (carrying two alleles for dark factor), it will be mauve. If a yellow base bird is heterozygous for dark factor it will be dark green, if it is homozygous, it will be olive green.