Figure 3

The relationship between proportional ancestry and skin pigmentation in three Hispanic populations. For all populations, proportional ancestry was estimated using the maximum likelihood (ML) method (adapted from Bonilla, 2003) [17]. (A) Percent Native American ancestry versus lightness index (L) in Hispanics from the San Luis Valley, Colorado (ancestry estimated using 22 AIMs). (B) Percent Native American ancestry versus melanin index in Mexicans from Tlapa, Mexico (ancestry estimates using 29 AIMs). (C) Percent African ancestry versus melanin index (M) in Puerto Ricans from New York City (ancestry estimated using 35 AIMs)