When DNA sequence or chromosome structure goes wrong, health can suffer. A genetic disorder is a condition caused by abnormalities in genes or chromosomes. Disorders range from single-gene Mendelian conditions to complex diseases influenced by many variants plus environment.

Examples include cystic fibrosis, sickle cell disease, Down syndrome, and hereditary breast cancer syndromes. Some are present at birth; others appear later in life. Inheritance patterns—dominant, recessive, X-linked, or mitochondrial—guide risk assessment for relatives.

Diagnosis increasingly relies on genomic sequencing and chromosomal analysis. Management may involve surveillance, medication, enzyme replacement, or gene therapy. Accurate diagnosis ends diagnostic odysseys for many families and opens access to targeted care and reproductive options.

• Condition caused by gene or chromosome abnormality
• Ranges from single-gene to complex disorders
• Follows specific inheritance patterns
• Diagnosed with molecular and cytogenetic tests