The terms Albino and Leucistic describe the result of a mutation, not the mutation itself
Therefore there are different genetic mutations that can result in Albinism or Leucism
often worded as types of Albinism or Leucism
To my knowledge, all forms of both Albinism and Leucism follow Medelian Genetics
Per Mendelian Genetics
Albino x Albino = 100% Albino
Albino x Standard = 100% Het
Albino x Het = 50% Albino / 50% Het
Het x Het = 25% Albino / 50% Het / 25% Standard
(Note: Replace Albino with Leucistic and the same holds true per Mendelian Genetics)
Some species can be partially affected by some forms of Albinism and/or Leucism when they are Het
this is the exception far more than it is the rule
Mendelian Genetics is a very common way for mutated genes to be passed and is very well documented. Feel free to google the term and learn more