The method used to identify the number of sets of chromosome
s within a cell
(i.e. its ploidy
). Each set is designated "n" so one set is n is haploid, two sets is 2n is diploid
, three sets is 3n is triploid
, four sets is 4n is tetraploid
, etc. Also, 2n+1 is known as trisomy
(i.e. two full sets plus a third copy of one of the chromosomes).
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.