When studying genetics, "pedigrees" are often used which indicate the genotype or phenotype of specific individuals in a family and their relationships (parents are drawn above offspring). Squares are male, and circles are female. Yellow shapes typically depict an unaffected (or healthy) individual whereas black shapes mean an affected (or diseased) individual. Imagine that the pedigree here depicts inheritance of a simple single-gene disease in a family. What can you infer about the disease depicted?