AP BIOLOGY

Detailed explanation-1: -P transposable elements were discovered in Drosophila as the causative agents of a syndrome of genetic traits called hybrid dysgenesis. Hybrid dysgenesis exhibits a unique pattern of maternal inheritance linked to the germline-specific small RNA piwi-interacting (piRNA) pathway.

Detailed explanation-2: -P elements are cut-and-paste transposons in the genomes of Drosophila melanogaster and several other Drosophila species. The transposition of these elements is catalyzed by an enzyme, the transposase, which is encoded by the structurally complete members of the P-element family.

Detailed explanation-3: -Which of the following about the P-element is false? Explanation: The P-element in Drosophila is one of the best examples of transposable elements in eukaryotes. This element is 2907 bp long and features a 31 bp inverted repeat at each end. This element encodes a transposase.

Detailed explanation-4: -One class of Drosophila transposable elements that has generated a lot of interest is the P element class. These are small transposons with terminal 31-bp inverted repeats, and the element generates 8-bp direct repeats of target DNA sequences upon insertion.