Allele-A Genetics Definition. An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. Credit: Darryl Leja, NHGRI.
Population of Swisher, IA Last official estimated population of Swisher city (Johnson County**, Iowa state) was 932 (year 2014) [1]. This was 0% of total US population and 0.03% of total Iowa state population.
Iowa is ranked 30th in the United States in state population at 3.046 million. Not surprisingly, the seven biggest cities in Iowa are each below 250,000 people in this largely rural state in the American Heartland.