The classic gecko is born with black and yellow body bands that run from side to side. As the gecko matures, these bands break up into spots that often cover the body, but you can make out the original bands because there is a slightly higher density of spots where the bands were. The tail is similar, except that it's black and white banded. Eventually, geckos started hatching that had broken bands on body, tail or both. When the bands get broken to the point where there's a space in the middle all the way down the body, you get black "stripes" --ideally a black stripe running from shoulder to tail, and a similar stripe on the tail. Your gecko is an albino, so the stripes are tan rather than black. Some geckos, instead of having the 2 stripes on either side of the body, have one stripe down the middle of the back and that's called reverse stripe. If you look at your gecko you can see the stripe down the middle of the back (I think it's a reverse stripe) and the stripe pattern in the tail as well.
Aliza