Zygosity Testing

Zygosity Testing

Our zygosity testing service for transgenic models uses hydrolysis probes to quantitatively determine if samples are homozygous or hemizygous for the transgene of interest. This differs from our standard genotyping service for transgenic samples which only reports qualitative results (presence/absence.) Sample zygosity is determined by comparison to known controls using the delta Cp (crossing point).  Heterozygotes and homozygotes are expected to be separated by at least 1 delta Cp.

Results are GTCAssured with each sample tested using a single assay with two independent runs. We utilize a proprietary DNA isolation method to maximize DNA quality and generate consistent, unambiguous results. Our reports, including all methods and raw data for complete evaluation and publication purposes, are delivered in 3-business days, guaranteed (allow additional time for new assay design.)

Calls are based on relative amplification vs. the performance of control samples.  In the absence of proper controls, tentative calls can be made based on relative amplification if both genotypes are present.  However, no zygosity call can be made if only one genotype is present.


  • $9.00 per transgene, plus $8.00 per other additional targets.
    Pricing is per sample, so… 
    … a single sample with 1 transgene costs $9 
    … a single sample with 1 transgene and 1 additional target costs $9 + $8 = $17 
    … a single sample with 1 transgene and 2 additional targets costs $9 + $8 + $8 = $25
    … etc.
  • Start your FREE Trial today!

*Additional testing not indicated on the original submission, but requested within 24-hours after results are delivered, will be charged at the additional target price.  Testing requested beyond 24-hours will be charged at the 1st transgene price.

Sample Submission Information:

  • Strain name
  • Strain crossing information (to ensure that our assays do not cross react with other mutations)
  • Mutation design information (for commercially available strains only the vendor information is necessary)
  • Hemizygous and homozygous controls (only needed with first sample submission for assay development)*