The remaining UGT1A6 mutations within felids arose more recently within certain lineages, with the most recent occurring in the jaguar less than 2.1 (CI: 1.2 3.5) MYA.
That was unexpected, said Lalueza-Fox, because the mutation for blue eyes was thought to have arisen more recently than the mutations that cause lighter skin colour.
"There are key gene mutations that we know are associated with diseases such as cancer and diabetes and we want to see if Oetzi had them or whether they arose more recently," he said.
True rhodopsin (Rh1, expressed in the rods of jawed vertebrates) arose more recently, after the divergence of lampreys.
The European common toad (Bufo bufo) seems to have arisen more recently.
In this vein, OR51V1 appears to have arisen more recently than OR51A1P.
On the other hand, it might be relevant that butterflies show greater affinity to fish, a relatively ancient lineage among vertebrates, than to birds, which arose more recently.
Rather, this allele class and the alternate form of social behavior with which it is associated conceivably arose more recently, then spread among species of the socially polymorphic clade through hybridization (see also [42]).
In addition to the families inferred to be present in the 93 million year-old MRCA, 2,278 gene families are found in only a subset of extant taxa and likely arose more recently (Table 1; "Creations").
Widespread attention to these issues has arisen more recently.
The rest of complexes must have arisen more recently.
