Genomic formula
(Science: molecular biology) The method used to identify the number of sets of chromosomes within a cell or organism (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).
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