Complex sentence: CRISPRs (Clustered Regularly Interspaced Short Palindromic Repeats) are loci containing multiple short direct repeats that are found in the genomes of approximately 40% of sequenced bacteria and 90% of sequenced archaea.
Split into simpler sentences: CRISPRs (Clustered Regularly Interspaced Short Palindromic Repeats) is an acronym for DNA loci that contain multiple, short, direct repititions of base sequences. They are found in the genomes of approximately 40% of sequenced bacteria and 90% of sequenced archaea.