What is a gene study island?
A set of instructions in the DNA sequence of an organism.
What effect does genetic drift have on the allele frequency the fraction of individuals with a particular version of a given gene in a population?
Knock out mice are produced by impairing or deleting a particular gene expression. Thus the gene function (which was deleted) can be tracked by studying this knock out and the control mice. Lets say a gene is suspected to trigger immune response against a pathogen, one can study this by infecting the wild type(normal) and knock out(specific gene deleted) mice and study the role of the gene.