Regions with no trace of gene order conservation are not rare, even between closely related organisms.

Models tend to be relatively closely related organisms, but mimicry of vastly different species is also known.

This technique may be used to clarify relationships within any group of related organisms.

This is because related organisms have (to a degree) a shared genetic inheritance.

There was no sign of related chlamydial and mycoplasmal organisms.

These do not have to be biologically related organisms.

Biology defines a species as a group of related organisms.

Consequently, structures with similar internal organisation may have different functions in related organisms.

Unlike in transgenesis, genes are only transferred between closely related organisms.

You can regard Figure 2, therefore, as a picture of seven related organisms, identical to each other except with respect to Gene 9.