2000•Journal of Genetic CounselingOpen access

Update and Review: Supernumerary Marker Chromosomes

Sharon Ungerleider

Abstract

Supernumerary marker chromosomes (SMCs) are found in individuals with normal and abnormal clinical phenotypes. Correlations between karyotype and phenotype have been made in only a few circumstances. This article summarizes the most recent information regarding supernumerary marker chromosomes, including genetic counseling issues.

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Key concepts: Supernumerary, Small supernumerary marker chromosome, Genetic counseling, Marker chromosome, Karyotype, Genetics, Phenotype, Biology