Isaiah's SimDNA in SimPE shows that he carries the recessive allele for blond hair. His dominant skin tone range is for light skin, even though both his dominant and recessive alleles are for tanned skin, and his recessive skin tone range is also for tanned skin.[clarification needed] While Isaiah's mother is homozygous for green eyes, Isaiah himself is homozygous for dark blue eyes. When viewing his character data in SimPE, it can be seen that he doesn't have a gender preference at the start of the game. This is also the case of the Newson family siblings.