GLI3 rs62443772: Facial Shape Variation and Morphology
The genetic variant rs62443772 is a common single nucleotide polymorphism located in the GLI3 gene region on chromosome 7. Scientific research has associated this variant with natural human facial shape differences, including subtle variations in nose and midface morphology. It reflects benign morphological diversity rather than a medical disorder or clinical diagnosis.
What each genotype means
Typical facial morphology profile
You carry two copies of the common C allele at rs62443772 in the GLI3 region. In genome-wide association studies, this baseline genotype is associated with typical craniofacial and nasal morphology variations rather than the distinct shape shifts linked to the minor allele. Because facial form is highly polygenic and shaped by hundreds of genetic loci alongside environmental factors, this variant alone exerts only a subtle influence on your overall appearance.
Carried by approximately 75% to 85% of individuals globally, making it the most common genotype across most world populations.
Altered facial shape tendency
You carry one copy of the T allele at rs62443772 near the GLI3 gene. Published research identifies this variant as contributing to subtle normal-range differences in facial morphology, specifically interacting with other craniofacial pathways like PRDM16 to modulate regional facial depth and nasal parameters. This is a common non-pathogenic variant reflecting natural human physical diversity rather than any medical condition.
Carried by approximately 15% to 25% of individuals in European and admixed Latin American populations, with varying frequencies across other ancestries.
Distinct facial morphology tendency
You carry two copies of the less common T allele at rs62443772 within the GLI3 locus. In population-level studies, carrying two copies of this allele has been linked to distinct statistical tendencies in localized facial feature measurements, such as nasal and midface contours. These phenotypic effects represent normal, benign anatomical variations and interact with multiple other developmental genes across the genome.
Found in roughly 1% to 4% of individuals across European and American cohorts, representing the least common genotype.
Genomic Context and the GLI3 Locus
The single nucleotide polymorphism rs62443772 is situated within the genomic region of the GLI3 gene, located on chromosome 7. GLI3 encodes the GLI family zinc finger 3 protein, a critical transcription factor operating in the Sonic Hedgehog signaling pathway. During embryonic development, this pathway plays an indispensable role in pattern formation, guiding the structural development of the brain, limbs, skull, and facial features. Rare, severe loss-of-function or truncated mutations in GLI3 cause developmental genetic syndromes such as Greig cephalopolysyndactyly syndrome and Pallister-Hall syndrome. In contrast, rs62443772 is a common non-coding variant that does not cause monogenic developmental conditions. Instead, it acts as a subtle regulatory marker associated with ordinary phenotypic variability.
Facial Morphology Research and Epistatic Interactions
Genome-wide association studies (GWAS) analyzing 3D facial imaging have uncovered multiple genetic loci that shape human facial features. Statistical investigations have identified rs62443772 in connection with facial morphology traits, particularly variations in nasal structure and midface segment positioning. Additionally, complex trait mapping has documented evidence of epistatic interactions involving this GLI3 locus and genes such as PRDM16. These interactions illustrate how multiple developmental transcription factors work in concert to modulate facial dimensions in human populations. The current statistical evidence linking rs62443772 to facial shape variation is considered moderate, supported by standardized multidimensional phenotypic scans, though individual variant effect sizes remain small.
Population Frequency and Diversity
Allele frequencies for rs62443772 exhibit notable variability across global populations recorded in major genomic databases like gnomAD and dbSNP. Depending on geographic ancestry, the frequency of the alternative allele shifts considerably, making specific genotypes more prevalent in some continental groups than others. This broad variation is characteristic of non-pathogenic polymorphisms involved in external visible traits, which often reflect ancient population migrations, neutral genetic drift, and polygenic adaptation. Because the variant's prevalence fluctuates across groups, its statistical association with precise facial dimensions can also vary based on an individual's specific ancestral background and the genetic architecture of the studied cohort.
Interpreting Consumer Genetic Information
Discovering your genotype at rs62443772 provides an interesting glimpse into the polygenic basis of human appearance, but it has important limitations. Human facial morphology is shaped by thousands of interacting genetic loci along with environmental, nutritional, and biomechanical factors. A single variant like rs62443772 accounts for only a minor fraction of overall facial variation and cannot be used to reconstruct a person's appearance or predict exact facial measurements. Most importantly, having a specific genotype at rs62443772 carries no clinical significance and should never be conflated with the rare clinical mutations in GLI3 that cause developmental syndromes. It is a benign genetic marker reflecting the normal continuum of human biological diversity.
How common is this variant?
The frequency of rs62443772 varies widely across worldwide populations, with allele distributions differing significantly across continental ancestries.
Frequently asked questions
Does rs62443772 determine the exact shape of my nose or face?
No, rs62443772 does not determine your facial appearance on its own. Facial structure is highly polygenic, meaning it is influenced by thousands of genetic variants operating together alongside environmental factors. This variant contributes only a very small statistical effect to overall facial dimensions.
Is the rs62443772 variant linked to any genetic syndromes?
No, rs62443772 is a benign common polymorphism and is not associated with genetic disorders. While rare high-impact mutations in the GLI3 gene can cause conditions such as Greig cephalopolysyndactyly, common variants like rs62443772 simply reflect harmless normal physical variations.
How does GLI3 interact with PRDM16 to affect facial features?
Research into the genetics of craniofacial morphology suggests that GLI3 and PRDM16 may participate in coordinated developmental pathways. Statistical analyses show evidence of interaction between variants near these genes, subtly shifting the shape or projection of specific facial segments.
Can commercial facial recognition or forensics use rs62443772 to sketch my face?
No, forensic DNA phenotyping cannot accurately reconstruct a human face using individual markers like rs62443772. Because facial morphology results from complex interactions across the entire genome, individual SNP genotypes lack predictive power for visual identification.
Sources & further reading
Educational information only, last refreshed 9/11/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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