Yes - I think people refer to this as penetrance. I.e. there may be an overall inheritance pattern but additional factors (environment, additional genes, expos

Yes - I think people refer to this as penetrance. I.e. there may be an overall inheritance pattern but additional factors (environment, additional genes, exposures) are needed to cause the expression of the abnormal gene. A lot of conditions are autosomal dominant but incomplete penetrance, and researchers can roughly quantify the percent penetrance of specific conditions.