carrier testing

Carrier testing in genetics is a process used to determine if an individual has an increased risk of having a child with a specific genetic disorder, even if they themselves show no symptoms. This testing is often offered when there's a family history or ethnic background suggesting a higher risk for a particular condition.1

For example, couples with a known family history of an autosomal recessive disease have a 25% chance with each child of having an affected offspring, as both parents are carriers. If one parent carries a mutation for an autosomal dominant disease, there's a 50% risk for each child. For X-linked disorders, a carrier mother has a 50% chance of passing the gene to each son, who would then be affected.2

Genetic testing procedures can involve analyzing chromosomes, genes, DNA, or specific proteins like enzymes. This information helps prospective parents make informed family-planning decisions.31