In mathematics, a partial derivative of a function of several variables is its derivative with respect to one of those variables, with the others held constant (as opposed to the total derivative, in which all variables are allowed to vary).he cross partial derivative with respect to x and y is obtained by taking the partial derivative of f with respect to x, and then taking the partial derivative of the result with respect to y, to obtain.
Definition of a Single Nucleotide Polymorphism, SNP. A SNP is a site in the DNA where different chromosomes differ in the base they have. For example, 30 percent of the chromosomes may have an A, and 70 percent may have a G. These two forms, A and G, are called variants or alleles of that SNP.
What is a SNP file? Files that contain the .snp file extension are most commonly associated with Access Report Snapshot files. The SNP file format was developed by Microsoft and the SNP files contain a snapshot of reports that have been created in the Microsoft Access database application.