Question 1

What is Sickle Cell Disease (SCD)?

Accepted Answer

SCD is an inherited blood disorder where red blood cells become hard, sticky, and sickle-shaped, blocking blood flow. Healthy red blood cells are round and travel through small blood vessels to carry oxygen. In SCD, they die early, causing a constant shortage of red blood cells (anemia). When they travel through small blood vessels, they get stuck and clog blood flow, which can lead to severe pain, infection, acute chest syndrome, and stroke. (Source: CDC)

Question 2

What is Sickle Cell Trait (SCT)?

Accepted Answer

Sickle Cell Trait (SCT) occurs when a person inherits one sickle cell gene and one normal gene (Genotype AS). People with SCT are generally healthy carriers. However, in rare cases, especially under extreme conditions like intense exercise, high altitude, or dehydration, individuals with SCT can experience health complications. They can also pass the gene to their children. (Source: WHO, CDC)

Question 3

How is Sickle Cell Disease inherited?

Accepted Answer

SCD follows an autosomal recessive inheritance pattern, meaning a child must inherit two sickle cell genes (SS) to have the disease. For example, if both parents have sickle cell trait (AS), there is a 25% (1 in 4) chance with each pregnancy of having a child with SCD (SS). There's also a 50% chance the offspring will have the trait (AS) and a 25% chance the child will be unaffected (AA). This is critical for family planning. (Source: WHO)

Question 4

Can this calculator diagnose Sickle Cell Disease?

Accepted Answer

No, this calculator provides statistical probabilities only. This tool is for informational and educational purposes only. It calculates the statistical probability of inheritance based on the genetic information you provide. A definitive diagnosis requires a blood test (hemoglobin electrophoresis) administered by a qualified doctor.

Genetic Inheritance Calculator

Mendelian Genetic Inheritance for SCD

Key Medical Definitions

Parent 1 Genotype	Parent 2 Genotype	AA (Normal) %	AS (Trait) %	SS (Disease) %
AA	AA	100%	0%	0%
AA	AS	50%	50%	0%
AA	SS	0%	100%	0%
AS	AS	25%	50%	25%
AS	SS	0%	50%	50%
SS	SS	0%	0%	100%