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This chart represents the Illumina sequence coverage over the Bt/Bd allele. These are the three regions in the cannabis genome that impact THCA, CBDA, CBGA production. Coverage over the Active CBDAS gene is highly correlated with Type II and Type III plants as described by Etienne de Meijer. Coverage over the THCA gene is highly correlated with Type I and Type II plants but is anti-correlated with Type III plants. Type I plants require coverage over the inactive CBDA loci and no coverage over the Active CBDA gene. Lack of coverage over the Active CBDA and Active THCA allele are presumed to be Type IV plants (CBGA dominant). While deletions of entire THCAS and CBDAS genes are the most common Bt:Bd alleles observed, it is possible to have plants with these genes where functional expression of the enzyme is disrupted by deactivating point mutations (Kojoma et al. 2006).