Complex sentence: It is the result of the Burmese gene (cb), part of the albino series, which causes a reduction in the amount of pigment produced converting black into brown, and rendering all other colours likewise paler than their usual expression.
Split into simpler sentences: It is the result of the Burmese gene (cb), part of the albino series. This gene causes a reduction in the amount of pigment produced, converting black into brown and rendering all other colours likewise paler than their usual expression.