A lot of people aren't fans of the all-knowing Punnett Square (http://en.wikipedia.org/wiki/Punnett_square), but I think in this case a simple square can answer the question quite concisely, no? Check out the wikipedia link and assume that the dominant allele is "A" and that the recessive is "a". A genotype of "aa" is necessary to produce an albino ball. AA is a normal and Ab is heterozygous.
Keep in mind Punnet Squares won't tell you how the trait in question will be expressed physically. They also may not work when 2 alleles are co-dominant.
Just another visual. Hope it helps.
DISCLAIMER: I'm not a geneticist or BP breeder. This is just the stuff I remember from my highschool genetics class. Also, I'm not 110% sure albinism is recessive in BPs.
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