DefinitionSex-linked dominant is a rare way that a trait or disorder can be passed down through families. A single abnormal gene on the X chromosome can cause a sex-linked dominant disease.Related terms and topics:Autosomal dominantAutosomal recessiveChromosomeGeneGenetic counseling and prenatal diagnosisHeredity and diseaseInheritanceSex-linked recessiveAlternative NamesInheritance - sex-linked dominant; Genetics - sex-linked dominant; X-linked dominant; Y-linked dominantInformationInheritance of a specific disease, condition, or trait depends on the type of chromosome affected (autosomal or sex chromosome). It also depends on whether the trait is dominant or recessive. Sex-linked diseases are inherited through one of the sex chromosomes (the X or Y chromosome).Dominant inheritance occurs