<span>When a testcross between f1 dihybrid flies produces
more offspring with both traits like those of one parent, or the other than
offspring with recombinant-type traits are produced means that the two genes are
link. The reason that linked genes are inherited together is that they are
located on the same chromosome.</span>
Answer:
Compound
Explanation:
everything else only produces a single image also I've used compound microscopes to observe living things