The Fall and Rise of the Puerto Rican Taino Indian People.....(1-4)

Dr. Juan Martinez Cruzado, a geneticist from Puerto Rico, designed an island-wide DNA survey,funded by U.S. National Science Foundation, shows that 61 percent of all Puerto Ricans have Amerindian mitochondrial DNA, 27 percent have African and 12 percent Caucasian. (Nuclear DNA, material present in a gene's nucleus, is inherited in equal parts from one's father and mother. Mitochondrial DNA is inherited only from one's mother and does not change or blend with other materials over time.)