Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: One type of these entities is characterized by identical sequences of about 400 repeated base pairs flanked by inverted repeats of about 15 base pairs. Another type of these structures is responsible for causing the condition of hybrid dysgenesis in Drosophila. In addition to MITEs and P elements, another type of these structures found abundantly in humans is called Alu elements which are a form of SINEs. The first one to be discovered is the Ac-Ds system which was found during studies of the maize plant. First discovered in 1983 by Barbara McClintock, for 10 points, identify these mobile sequences of DNA that are often nicknamed "jumping genes. "
A:
Science