What is the mode of inheritance of this trait? b. what is the penetrance of this trait [that is, the ratio between the number of individuals in the pedigree who display the trait (numerator), and the number of individuals you know from the pedigree must have the trait-determining genotype regardless of whether they have the trait or not (denominator)]? c. using your answer to part (b) above, what would you tell the parents about the numerical likelihood their expected child will have split-hand deformity?