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: -Hybrid dysgenesis is an epigenetic phenomenon that has been linked to piRNAs in Drosophila melanogaster. It occurs when two fly lines are crossed that differ in the TE families present in their genome. Depending on the direction of the cross, the resulting offspring are sterile.

Detailed explanation-3: -P elements are transposable elements that were discovered in Drosophila as the causative agents of genetic traits called hybrid dysgenesis. The transposon is responsible for the P trait of the P element and it is found only in wild flies. They are also found in many other eukaryotes.

Detailed explanation-4: -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-5: -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.