Adult Drosophila lays 50-100 eggs per day, and each contains a shell made of so-called chorion proteins. These specialized proteins need to be produced at a very high level, at a precisely specific stage of oogenesis. The genes encoding chorion genes are clustered together. As a way to greatly increase expression of chorion genes, flies have evolved an unusual mechanism: they use endoreplication a process which amplifies only a limited part of the chromosome to increase the copy number of genes (this is done in a very specialized cell type that does not undergo normal divisions.A ~500 nucleotide amplification-control element was identified in the chorion locus that serves as a seed for endoreplication. When moved to another part of the chromosome, those new sites also get amplified upon a specific signal.Draw the chromosome view of endoreplicated chorion cluster (start with double-stranded DNA; it may help to draw it sequentially - before amplification, at round 1, and at round 2. Round 3 is optional, and itll get way too complex after that!)