DefinitionThis section has been translated automatically.
Mode of inheritance in which a trait only occurs if the causative allele is present twice (= homozygosity). Heterozygous gene carriers (allele only present once) are usually not clinically recognizable, they are called investment carriers. The corresponding gene is located on an autosome and is inherited independently of sex. In heterozygous, clinically healthy parents, there is a risk of 25 percent for each affected child.