what measures are used to test for differential expression of a gene? why is there no correlation between gene expression and disease what is the difference between a tsp and a differential expression study for a disease? why gene expression is regarded as a negative identifying characteristic of diseases? are gene expression tests necessary for diagnosis predicting whether a gene expression study is negative what is meant by negative gene expression what is the implication of differentially expressed genes to the presence of a disease how is gene expression measured does a tsp test depend on differential expression what is meant by a negative gene study which analysis is based on a negative finding? if a gene expression study is negative, then why do we use the standard approach a gene expression test cannot be used for a disease. can gene expression be used to diagnose a disease what method do we use to test differential expression in a disease test which is an important factor in the validity of genetic testing? what tests are performed for differential expression in diseases is a gene expression negative when the tsp gene is positive, what is the effect size