Life Science Standard Dictionary. A: Allele. Standard: S7L3a. Explain the role of genes and chromosomes in the process of inheriting a specific trait. An allele is a line on a chromosome that holds traits and contains Genes and DNA. A: Abiotic. Standard: S7L4d.
Update April 5, 2014: At the April 2014 General Conference, the Church announced that there were 83,035 full-time missionaries serving as of December 31, 2013.
Most of the Church's missionaries are around twenty years old, though many members also volunteer to serve after they've retired. All prospective missionaries turn in applications to Church headquarters and they receive a call to a specific mission around the world.