Known as "dyads" when duplicated, these biological structures contain a kinetochore at the centromere.  
They contain 5 different kinds of positively-charged proteins rich in lysine and arginine residues and which are known as histones.  Known as "dyads" when duplicated, these biological structures contain a kinetochore at the centromere.  Also containing various transcription factors, they are primarily composed of a single molecule of DNA in eukaryotes.  FTP, name these structures which include X and Y varieties.
They contain 5 different kinds of positively-charged proteins rich in lysine and arginine residues and which are known as histones.  
Chromosomes