Based on Mendelian inheritance,would it be necessary to have both the genotype and phenotype for an organism when attempting to predict the inheritance pattern for a trait,such as hair color,in offspring?

A) Yes; individuals with different genotypes often have the same phenotype.
B) Yes; individuals with different phenotypes often have the same genotype.
C) No; knowing the phenotype will indicate the genotype.
D) No; knowing the genotype will indicate the phenotype.