You decide to cross the reciprocal translocation strain to a
pure (black, sepia) line to generate female F₁
flies that are both translocation heterozygotes and BbSs
dihybrids.

You then backcross these F₁ females to males from the
pure (black, sepia) line. This diagram shows synapsis in
the F₁ females. (In the diagram, NII = normal chromosome
II; TII = translocated chromosome with the chromosome II
centromere; NIII = normal chromosome III; TIII = translocated
chromosome with the chromosome III centromere.)

You wish to recover several categories of F₂ flies. What
event must occur to produce each category of F₂ flies
listed in the table below?

Complete the table by dragging the labels to the correct locations.
Labels can be used once, more than once, or not at all. (Note: CO =
crossover; NCO = no crossover.)