The Eye Color & Height Predictor from DNA is an advanced genetic calculator that estimates an individual’s eye color and potential adult height based on their DNA markers. By analyzing specific gene variants associated with pigmentation and growth, this tool can provide probabilistic predictions of traits inherited from parents.
This calculator is designed for students, researchers, and curious individuals who want to explore how genetics shapes observable physical traits.
This calculator leverages polygenic inheritance, where multiple genes contribute to a single trait:
Eye color: Primarily influenced by OCA2 and HERC2 genes, with additional genes fine-tuning hue and intensity
Height: Controlled by a combination of hundreds of genetic loci, along with environmental factors such as nutrition and health
By understanding these gene-trait relationships, you can gain insights into how complex traits are inherited and expressed.
Eye Color Probability (%) = Σ (effect size of each allele / total contributing alleles) × 100
Predicted Height (cm) = Mean parental height ± Σ (allelic effect × standard deviation factor)
Where:
Effect size = the influence of each SNP on the trait
Allelic contribution = sum of variants associated with eye color or height
Standard deviation factor = adjusts height prediction for population variationStep 1:
Input DNA markers associated with eye color (OCA2, HERC2, etc.) and height-related SNPs.
Step 2:
For eye color, sum the effect sizes of alleles to predict probabilities:
Gene
Allele
Effect
Contribution
OCA2
G
0.6
Blue
HERC2
A
0.3
Brown
Others
T
0.1
Hazel
Step 3:
For height, use parental heights and allelic effects:
Predicted Height = (Father Height + Mother Height)/2 + Σ(Allele effect)
Step 4:
Output results:
Eye color probabilities: Blue 60%, Brown 30%, Hazel 10%
Predicted adult height: 175 cm ± 5 cm