The correlation between biology and facial appearance
But why does the brain dedicate so many resources into assigning large areas, cells, and neurons to recognize faces compared to other objects? This is because the face contains important and evolutionarily critical information. The face allows us to identify a person, to know whether we can rely on him, the face allows us to know the mood of the other, his gender, his age, his family closeness, his health, his parental suitability and even his developmental and genetic history.
Research shows a connection between facial structure and genetics.
For example, the PAX3 gene, which affects the structure and location of the nose, and mutations in the gene may develop into the warrensburg syndrome, which is well seen by the observer and suggests a genetic health problem.
Symmetry in the face shows the ability to cope with environmental data during development and the ability to cope with stressors and infections during development. People differ in their internal immune systems and their ability to maintain their steady development under environmental conditions.
Hormones also affect the appearance of face and body. Humans begin their lives as a female, but the amount of exposure to the hormone testosterone determines whether male or female affects the appearance of the face. Hormones also reflect clues about fertility and the availability of paired energy.
As science has shown, a structure and facial appearance is shaped by the individual biology and teaches about genetic quality, hormonal balance, health status and the information required to know how to deal with those who face it, to reproduce and survive for generations to come.
Barber, N. (1995). The evolutionary psychology of physical attractiveness: Sexual selection and human morphology. Ethnology and Sociobiology(16), 395-424.
Law Smith, M', Perrett, D', Jones, B', Cornwell, R', Moore, F', Feinberg, D', . . . Hillier, S'. (2005). .Facial appearance is a cue to oestrogen levels in women. Proceedings of thr Royal Society, vol. 273(1583), 135-140.
Lefevre CE, L' G'. (2013). Telling facial metrics: Facial width is associated with testosterone levels in men. Evol Hum Behav(34), 273–279.
Liu F, e. a. (2012). A genome-wide association study identifies five loci influencing facial morphology in Europeans. PLoS genetics(8, e1002932 )Moalem, S. (2014). Inheritance-How Our Genes Change Our Lives - and Our Lives Change Our Genes. Christian Perring.
Møller A. P., S' J'. (1997). Asymmetry, developmental stability, and evolutionPaternoster.L, A. I. Zhurov, A. M. Toma et al., “Genome-wide association study of three-dimensional facial morphology identifies a variant in PAX3 associated with nasion position,” American Journal of Human Genetics, vol. 90, no. 3, pp. 478–485, 2012
Peter Claes, D. K. (2014). Modeling 3D Facial Shape from DNA. PLOS Genetics, 3(10:e1004224). doi:10.1371/journal.pgen.1004224http://www.openu.ac.il/adcan/adcan48/pages26-31.pdf