an 18 1/2-year-old female is described with moderately severe mental retardation , the phenotype of the trisomy 9p syndromy , and an isochromosome for the short arm of a chromosome 9 , contained in an unique karyotype , 46 , xx , -9 , t ( 7q9q ) , + iso 9p .
C0008633
chromosome
C1515492
9p