People Prefer Partners With Similar Ancestry Share : 
The study shows that Mexicans mate according to proportions of Native American to European ancestry, while Puerto Ricans are more likely to settle down with someone carrying a similar mix of African and European genes.For the research, Neil Risch, from the University of California, San Francisco, and his team studied the effects of ancestry on partner choice in Mexicans and Puerto Ricans living in their own countries or in the USA.
The subjects came from The Genetics of Asthma in Latino Americans (GALA) study, conducted by Risch’s UCSF colleague, Esteban Gonzalez Burchard.
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