>>>No matter how often I try the calc'n over, using a Mendelian Formula, I keep getting 1:16 (the square root of 256). That is if both parents have one allele for albinism - that's the only way it'll show up.<<< Isn't 1:16 the ratio for each parent and then you'd have to calculate the odds of the two of them breeding? Bill Vannerson McHenry, IL http://ourworld.compuserve.com/homepages/william_vannerson ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!