Figure 2.

AG sound types for mother-reared subjects whose mothers are also AG+ (n = 19). AG sounds are classified based on the descriptions in table 1. Note that two subjects (offspring) produced two types of AG during their vocal assessments, RS and EG. The mothers of both subjects produced RS. Both subjects were included in our analysis as concordant for vocal type with their mother. Light grey bars denote AG+ offspring with mothers that produce same AG sound type and dark grey bars denote total offspring (AG+) that produce each AG sound type.