Cytological Elucidation of a 17p Marker Chromosome

Abstract
A 17p marker or variant chromosome 17 was observed in nine of twenty-four members of a family. Structure, satellite association, autoradiography and appearance of the marker chromosome were employed to show that the secondary constriction of the so-called « satellited 17 » was not of the satellite stalk type but instead identical to Schmid'S type 4 « heterochromatic chromosome section ».