'These results will have future implications in forensic medicine and genetic diagnosis.'
"These people really look alike because they share important parts of the genome or the DNA sequence," Esteller. That people who look more alike have more genes in common "would seem like common sense, but never had been shown," he added.
Physical traits such as weight and height, and behavioral traits such as smoking and education, were correlated in lookalike pairs. Altogether, the results suggest that "shared genetic variation not only relates to similar physical appearance but may also influence common habits and behavior"."We provided a unique insight into the molecular characteristics that potentially influence the construction of the human face," Esteller said.
Small sample size, the use of 2D black-and-white images, and the fact that the majority of the cohort included European participants were a few study limitations. Despite these, the findings may provide a molecular basis for future applications in various fields such as biomedicine, evolution, and forensics.
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