Family Height Genetics Calculator
Advanced genetic analysis using extended family height data. Get polygenic risk scores, heritability analysis, and inheritance patterns for comprehensive height prediction.
Family Members (0)
No family members added yet
Start by adding both parents
Add Family Member
Advanced Family Genetics Analysis
Family genetics analysis provides the most comprehensive height prediction by incorporating multiple generations of genetic data. This approach can be 15-20% more accurate than simple parental height methods when sufficient family data is available.
Genetic Contribution by Relationship
- Parents: 50% genetic contribution each (direct inheritance)
- Grandparents: 12.5% each (second-generation effects)
- Siblings: ~45% shared genetics (helpful for validation)
- Aunts/Uncles: 25% shared genetics (extended family patterns)
Polygenic Risk Scores
Polygenic risk scores estimate the cumulative effect of multiple height-related genes. While simplified in this calculator, real polygenic scores consider hundreds of genetic variants that collectively influence adult height.
Heritability and Environmental Factors
Height heritability is approximately 80%, meaning genetics account for about 80% of height variation within populations. The remaining 20% comes from:
- Nutrition during growth periods
- Overall health and disease history
- Hormonal factors and puberty timing
- Environmental stressors
Clinical Applications
Extended family analysis is used in clinical genetics for:
- Identifying familial short or tall stature patterns
- Assessing risk for growth disorders
- Genetic counseling for family planning
- Research into height-related genetic variants
Limitations and Considerations
While more accurate than simple methods, family genetics analysis still has limitations:
- Cannot predict individual genetic recombination events
- Assumes similar environmental conditions across generations
- May not account for rare genetic variants
- Requires accurate family height reporting