The Genetic Disease Risk Checker is an advanced tool designed to estimate your likelihood of inheriting or passing on genetic disorders based on family history, genotype, and allele information. By analyzing genetic data and applying Mendelian inheritance principles, this calculator provides a risk percentage for common inherited diseases, helping individuals and families make informed health decisions.
It bridges the gap between genetic science and personalized healthcare, making complex predictions easy to understand.
Genetic disease risk refers to the probability that an individual will inherit or transmit a disease-causing allele. Genetic disorders can be:
Autosomal dominant – one copy of a mutant allele causes the condition
Autosomal recessive – two copies of a mutant allele are required
X-linked – mutations on the X chromosome affecting mostly males
Polygenic or multifactorial – influenced by multiple genes and environmental factors
Understanding genetic risk allows proactive health management, early diagnosis, and lifestyle adjustments.
Autosomal Recessive Risk = (Probability of each parent contributing mutant allele) × 100
Autosomal Dominant Risk = (Probability of inheriting at least one dominant allele) × 100
X-linked Risk (male) = Probability mother carries allele × 100
X-linked Risk (female) = Probability mother carries allele × 50
Where:
Parental genotypes are used to calculate offspring probabilities
Calculations assume Mendelian inheritance patterns
Risk is expressed as a percentage chance for the child or individualExample: Predicting risk for cystic fibrosis (autosomal recessive)
Step 1:
Enter parental genotypes (Father: Aa, Mother: Aa)
Step 2:
Determine possible gametes for each parent (A or a)
Step 3:
Construct Punnett square:
A
a
A
AA
Aa
a
Aa
aa
Step 4:
Identify offspring with disease-causing genotype:
aa
Step 5:
Calculate risk:
1/4 × 100 = 25% chance child will have the disease