Employees are entitled to their final paycheck, in due time. Comstock/Comstock/Getty Images. An expired payroll check can create a financial accounting problem for any company. Companies may have to account for expired checks because employees fail to pick them up or fail to cash the check. Employers have various options for dealing with a final or stale paycheck, but once the check expires it creates additional work for the payroll department.
allele frequency. The allele frequency represents the incidence of a gene variant in a population. Alleles are variant forms of a gene that are located at the same position, or genetic locus, on a chromosome.
ALLELE - one of the two or more alternative states of a gene that occupy the same position (locus) on homologous chromosomes; alleles are separated from each other at meiosis. ALLERGY - hypersensitivity, often to external agents, in which mast cells of the immune system initiate inflammation.