It has been discovered that pointy or snub noses may have certain genetic sequences behind them.
Genetic components are responsible for human nose shapes. These consist of four genes and they govern the width and pointy nature of the noses that are distributed over large segments of the population.
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This adds to our knowledge of how the human face evolved in the first place. It will also aid future forensic studies which delve into how the genetic makeup yields the human face profile. The study was published in the journal Nature.
About 6000 people with differences in lineage were observed. They hailed from Latin America. There were differences in facial physiognomies and certain genes controlled the nose and chin patterns.
Five genes were identified: DCHS2, RUNX2, GLI3, PAX1 and EDAR. The first four affect the width and pointiness of the nose. The fifth one affects the length of the chin.
Until now the research on such matters has been few and far between. What little has been done has taken place with regard to European populations. These show a lack of diversity. The role of the genes maps out the evolutionary journey of human beings from Neanderthal Man to Modern Man.
Genes determine the way we look. The environment too plays a role in this physiognomy equation. The nose deals with the hotness or coldness of the air and the humidity levels.
It thus takes on different shapes and sizes in different climates. The narrower nose of Europeans is designed to deal with a cold and dry climate. Also face abnormalities are dependent once again upon genes.
The countries involved in the study were: Mexico, Brazil, Colombia, Chile and Peru. The ancestry of the participants was Mixed European, Native American and African in nature.
There were thus variations in facial features. Over 14 different facial features were examined in the study. The genetic components driving the body to alter itself were also noted down.
A 3D reconstruction of the faces of many of the participants were made all the better to determine which genes affected which facial features. These genes are involved in bone and cartilage development.
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There are genes responsible for cartilage growth and then there are those which cause the breadth of the nostrils to expand. Nose pointiness also had its share of genetic components. One gene even aided the bridge of the nose in its width.