And eventually the X ray radiation breaks the bonds within this section and this section. And so we have the breakage of that particular segment of DNA. Now, what happens during inversion is once this breaks off, it basically reverses its orientation and so it flips. So here the purple section is upward, and here the purple section points downward. And now it can basically reattach itself into this section of the chromosome. And so we have this altered chromosome in which we still have this entire segment of DNA within the chromosome.