Final answer:
When two spotted salamanders with an incomplete dominance inheritance pattern are crossed, the offspring's genotypes and phenotypes will be 25% black (BB), 50% spotted (Bb), and 25% white (bb).
Step-by-step explanation:
When crossing two spotted salamander individuals, the inheritance pattern described suggests that the spotted phenotype is a result of incomplete dominance. Incomplete dominance occurs when the heterozygous phenotype is intermediate between the two homozygous phenotypes. If we denote the allele for black as 'B' and the allele for white as 'b', a spotted salamander would have the genotype 'Bb'. A cross between two spotted salamanders (Bb x Bb) would result in the following genotypic ratio: 1 BB: 2 Bb: 1 bb, which translates into a phenotypic ratio of 25% black (BB), 50% spotted (Bb), and 25% white (bb).
Therefore, the genotype percentages for the offspring of two spotted salamanders would be 25% BB, 50% Bb, and 25% bb, while the phenotype percentages would be 25% black, 50% spotted, and 25% white.