A crowbar is used to lift a heavy rock. The mechanical advantage of the crowbar is 4 and the crowbar applies a force of 800 N to the rock. What is the input force applied to the crowbar?

Transposon can cause mutations in genes at or near the site of transposon insertion. it is possible for these elements to transpose away from their original site, causing a reversion of the mutant phenotype. in some cases, however, even more severe phenotypes appear when these elements excise from this site, due to events at or near the mutant allele. what might be happening to the transposon or the nearby gene to create more severe mutations?