The differences between a sprint, Olympic, and Ironman distance triathlonsâand how to choose between them. By Madeline Haller, Photography By Getty Images May 22, 2015.
Locus (genetics) A locus (plural loci) in genetics is the position on a chromosome. Each chromosome carries many genes; humans' estimated 'haploid' protein coding genes are 19,000-20,000, on the 23 different chromosomes. A variant of the similar DNA sequence located at a given locus is called an allele.
1 Locus: The location of a gene, or sequence of genes, on a chromosome; plural: loci. 2  Messenger RNA (mRNA): Single-stranded molecule of RNA that contains the instructions for protein synthesis. 3  Mutation: A change in the genetic material that results from an error in replication of DNA.