The platypus' genes are a possible evolutionary link between the mammalian XY and bird/reptile ZW sex-determination systems because one of the platypus' five X chromosomes contains the DMRT1 gene, which birds possess on their Z chromosome.
Our recovery of an independent single domain with effector-binding capacities is significant as a possible evolutionary precursor to the multi-domain transcription regulators, of which the AraC and MerR families are examples.
The disposable soma theory has been suggested as a possible evolutionary background for longer telomeres in females as compared to males in ants, rats and humans [17].
Additionally, the formation of metal sites at protein interfaces has been proposed as a possible evolutionary route toward efficient metalloenzymes.
It is not clear whether the observed in vivo antimicrobial activity is biologically relevant, is simply a residue of a possible evolutionary origin as an AMP, or derives from the conserved structural characteristics imposed by its function as an iron-regulating hormone.
However, only in one case (M. BssHII) has it been possible to reconstruct a possible evolutionary history of shuffled fragments [ 17].
However, we were able to reconstruct a possible evolutionary scenario that may have led to the current HyPRP diversity.
Based on extensive genomic rearrangements between MAP bovine and ovine strains, we were able to provide a possible evolutionary scenario for members of the MAC group.
A possible evolutionary explanation is that daughters are likely to mate and produce grandchildren regardless of condition, whereas weedy sons may fail in the struggle to have the chance to reproduce at all.
A possible evolutionary scenario is that the large-scale structure of metabolic networks is a consequence of preferential attachment, where newly acquired enzymes functionally extend the existing metabolic network structure as this can lead to an immediate fitness benefit [ 11, 12].
