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Reverse-engineering a T. rex genome

The recent discovery of a jaw disease, purportedly an avian disease, in T. rex 
got me thankin'  'bout thangs (and that is usually dangerous).

Assuming that, since the jaw disease is taxa-specific, that would mean that the 
afflicted taxa would share the same segment of the genome that causes the 
animal to get sick.

Does the discovery of this jaw disease in T. rex give us a clue as to what a 
segment of a T. rex genome looked like?  Would this mean that that gene 
(whereever it is) was shared between birds and T. rex?

How many genetic diseases to living birds have?

Could they provide us any clues as to the gene structure of tyrannosaurids?


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