Effects of genes on the nose shape| Nose shape variation genetics

Effects of genes on the nose shape can determine if you need rhinoplasty. Rhinoplasty in Iran, for example, is more common among people in the north of the country. The shape of noses is varied greatly between different populations. 
According to science news, scientists have found genes related to the nose shape. According to an article from University College London published in 2016:
There are four genes that drive the shape of human noses. This indicates that the effect of genes on the nose shape has been identified since 2016. The effect of these 4 genes is mainly on the:
•    Width of the nose
•    “protrusion” of the nose

Is nose shape genetic?

Is nose shape genetic? One of the parameters that affect the nose shape is genetics. The nose is a striking and highly variable feature of the human face. One of the first characteristics that develop during embryonic development is the nose.
People have different shaped facial features based on their genetic heritage. This is partly due to how the environment influenced the evolution of the human genome. For example:
Our nose is important for regulating the temperature and humidity of the air we breathe in. Therefore, developed different shapes in warmer and cooler climates. 
Scientists speculate that the nose shape reflects the environment in which humans evolved. An example is the comparatively narrower nose of Europeans that has been to represent an adaptation to a cold, dry climate.

What genes determine nose shape?

In general, the researchers identified five genes that play a role in controlling the shape of specific facial features.
4 of these genes, as we said, affect the shape of the nose and are as follows:
•    DCHS2
•    RUNX2
•    GLI3
•    PAX1
Another gene that affects chin protrusion is –EDAR--.
Generally, these genes are involved in bone and cartilage growth and the development of the face.

-DCH2

DCH2 is a gene that causes cartilage to grow. It can also control nose ‘pointiness’.
Identifying genes affecting nose shape can help us understand what goes wrong in genetic disorders involving facial abnormalities.

- RUNX2

RUNX2 drives bone growth and nose bridge width.

-GLI3

GLI3 is a gene to drive cartilage growth –GLI3 gave the strongest signal for controlling the breadth of nostrils.

-PAX1

PAX1 also promotes cartilage growth and also affects the width of the nostrils.

Which parent determines nose shape?

Which parent determines nose shape? Does nose come from Mom or Dad?  Have you ever thought about these questions?
Usually, 50% of a child’s DNA is made up of maternal genes and the other 50% is made up of father genes. However, male genes are much stronger than female genes, so they usually have a more pronounced effect. As a result, typically 40% of female genes and 60% of male genes are active.
The percentage that your face and nose may be the result of your parents ‘genesis as follows:
•    Nose tip around 66 percent
•    The philtrum around 62 percent

What is the rarest nose shape?

The rarest of all the nose types is the flat, rounded shape which was found in only one face out of 1793 considered. In other words, 0.05 percent of the population. Genetics primarily determines your nose shape. But the natural aging process causes distinct changes.
Beauty is subjective, but a Greek or straight nose is traditionally considered the most attractive shape of a nose.

The perfect female noses

 The perfect female noses are typical as follows:
-    Shorter and smaller, with a slightly scooped bridge
-    An upturned nasal tip
However, note that there is no “Ideal” nose shape for women. Because the perfect nose for any specific person should be relative to their facial proportions. 

The nose keeps growing

Your nose grows with age, but only up to a certain point. After that, it may change size and shape. This change in size and shape is not because of your nasal growth. It is because of changes to the bone, cartilage, and skin that give your nose form and structure.
As you age, the cartilage of the lower nose loses its shape. Cartilage contains collagen and it will droop or sag as it loses shape. (Sometimes this resulting in a fleshy nose appearance).