PAX3 rs7516150: Genetic Influences on Facial Structure
The genetic variant rs7516150 is a single-nucleotide polymorphism located in the PAX3 genomic region on human chromosome 2. Genome-wide association studies have identified this locus as a contributor to subtle, normal variations in facial morphology, specifically the positioning of the nasion at the bridge of the nose. Rather than indicating any medical disorder, rs7516150 serves as a biological marker of normal human craniofacial diversity.
What each genotype means
Common facial morphology profile
This genotype represents the most common configuration for this position in many populations. Statistical associations from research indicate this genotype is linked to standard variations in the position and prominence of the nasion in healthy individuals.
Carried by the majority of individuals of European ancestry.
Typical facial morphology profile
As a heterozygous carrier, you possess one copy of the more common allele and one copy of the less common T allele. Research suggests that variations in this gene are associated with normal, healthy differences in facial features, such as the height and prominence of the nasal bridge.
Carried by roughly 1 in 4 to 1 in 5 people of European ancestry, based on an approximate T allele frequency of 0.15.
Variant facial morphology profile
Carrying two copies of the T allele is less common in many populations. Statistical studies suggest that individuals with this genotype may fall toward the observed end of the spectrum for nasion position and nasal profile morphology compared to those with the CC genotype.
This is the least common genotype for this variant, occurring in a small percentage of individuals of European ancestry.
Genomic Context and Variant Mapping
The variant rs7516150 is a common single-nucleotide polymorphism (SNP) situated on chromosome 2 within the genomic locus encompassing the PAX3 gene. It reflects a standard single-base substitution (commonly cataloged with C and T alleles) located in a non-coding region of the locus. Because it falls within non-coding sequence, rs7516150 does not alter the underlying amino acid sequence of the PAX3 protein. Instead, variants in this region often function as regulatory elements or serve as linkage proxies for nearby functional markers that modulate gene expression during critical periods of development.
The Biological Role of the PAX3 Gene
The paired box 3 (PAX3) gene encodes a transcription factor that plays an indispensable role during embryonic development, as documented in resources such as MedlinePlus Genetics. PAX3 is deeply involved in orchestrating the differentiation and migration of cranial neural crest cells, which give rise to skeletal and connective components of the human face and skull. While severe, rare disruptive coding mutations in PAX3 can cause monogenic conditions such as Waardenburg syndrome types 1 and 3 or craniofacial-deafness-hand syndrome, common non-coding variants modulate gene expression in a subtle manner, contributing to natural diversity in bone structure rather than pathology.
Scientific Evidence and Facial Profile Morphology
Moderate evidence from published genome-wide association studies (GWAS) links common variation across the PAX3 locus to measurements of human facial shape. In particular, landmark three-dimensional photogrammetry studies, such as research published in the American Journal of Human Genetics, have demonstrated that common PAX3 variants correlate with the position of the nasion—the midline depression between the eyes at the junction of the nasal bridge and the frontal bone. Associated variants at this locus account for minor, millimeter-scale differences along the vertical (height) and horizontal prominence axes of the upper nasal bridge.
Population Patterns and Allele Distribution
Data cataloged across population genomics initiatives show that the alleles at rs7516150 are common across human groups. In populations of European ancestry, the minor T allele is observed at an estimated frequency of approximately 0.15 (15%), with the C allele representing the major variant. Genotype frequencies follow standard population-genetic expectations, meaning that a substantial portion of individuals carry at least one copy of the T allele. However, allele frequencies can vary significantly across non-European ancestral cohorts, underscoring that facial morphology is shaped by different background genomic architectures.
Interpreting Results: Limits of Predictive Genetics
Understanding your rs7516150 genotype provides educational insight into one small component of polygenic developmental biology, but it cannot be used to predict or reconstruct an individual's appearance. Human facial features are exceptionally complex and polygenic, shaped by thousands of common genetic variants acting in concert alongside environmental, nutritional, and developmental influences. A single variant like rs7516150 contributes only a tiny fraction of the overall variation in nasal bridge structure and carries no diagnostic or clinical utility.
How common is this variant?
In European populations, the T allele occurs at an estimated frequency of approximately 0.15 (15%), while the C allele accounts for roughly 85% of chromosomes. Frequencies may differ across other global ancestral populations.
Frequently asked questions
Does having the rs7516150 variant change the shape of my nose?
The rs7516150 variant is statistically associated with millimeter-scale differences in nasion position, which is the point at the top of the nasal bridge between your eyes. However, because facial morphology is influenced by thousands of genes, this single variant will not visibly dictate the overall shape of your nose.
Is the rs7516150 variant related to Waardenburg syndrome?
No. While rare and severe coding mutations in the PAX3 gene can cause genetic disorders like Waardenburg syndrome, rs7516150 is a common non-coding variant that merely influences normal, healthy differences in facial proportions.
Can DNA testing companies reconstruct a face based on rs7516150?
No, reliable facial reconstruction cannot be achieved using single SNPs. While research studies examine average landmark measurements across large cohorts, the cumulative influence of many genes and non-genetic factors makes predicting individual facial features from rs7516150 impossible.
Is rs7516150 associated with any health or medical conditions?
Current research classifies rs7516150 as a benign morphological trait marker rather than a disease-causing risk factor. It is not known to cause medical issues, developmental disorders, or functional impairment.
Sources & further reading
Educational information only, last refreshed 9/6/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Get my report — $29Related variants in PAX3
Intronic variant in PAX3 associated with normal variation in human facial morphology, specifically nasion position and nasal root protrusion.
Significantly correlates with upper facial shape variation, specifically nasion position and forehead projection.
Associated with normal variation in human facial morphology, specifically upper lip positioning and philtrum contouring.
This variant is associated with facial morphology and is located in a gene known for its role in craniofacial development.
Discovered in genome-wide association analysis of large-effect single-gene variants influencing eye and peri-orbital morphology.