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.
Gross national product (GNP) per capita is the dollar value of a countrys final output of goods and services in a year, divided by its population. It reflects the average income of a countrys citizens.Knowing a countrys GNP per capita is a good first step toward understanding its economic strengths and needs.espite large differences in the GNP per capita of high-, middle-, and low-income countries, the trend across all countries is for the richest 20 percent of the population to earn incomes that are many times higher than the poorest 20 percent.