Similarly, the RNAse1 gene of ruminant artiodactyls and colobine monkeys is homologous in that the RNAse1 gene is present in the common ancestor, but the gene was duplicated independently in each group (Fig. 2), and each lineage has subsequently evolved a new, yet parallel, function for this gene, without sharing the same pattern of mutation and amino acid substitution (Zhang 2003).
The Sp8 gene has retained its function in regulating appendage/limb growth [ 9, 10, 12, 17] and that Sp7 has subsequently evolved a novel function, namely, regulating cartilage/bone formation [ 7].
This delta accreted and subsequently evolved to form a subaerial barrier in the mid-Holocene, as sea-levels stabilised during the sea-level highstand.
Genes in Salmonella with no homologs in E. coli K12 could either be HTGs or genes that have lost their genomic neighborhood and subsequently evolved to such an extent that no significant sequence similarities could be detected to support homology to any E. coli K12 gene.
A possible loss of laryngeal echolocation appears especially interesting given that one genus of cave roosting fruitbat (Rousettus) has subsequently evolved a simple from echolocation based on tongue clicking [38].
Second, these authors created reversion lines, that is, lines that evolved first on a novel host and subsequently evolved on the ancestral host again.
These proteins may have stemmed from a common ancestor and subsequently evolved to maintain only their scrambled Gly-Glu repeats, or they may be the product of convergent evolution.
Galaxies differ from one another in shape, with variations resulting from the way in which the systems were formed and subsequently evolved.
Since 2004, clade 2 viruses emerged and subsequently evolved into different subclades in different geographical regions.
