The DNA sequencing of the human and red jungle fowl genomes revealed that there are so many similarities between the two species that the genes cannot only be recognized as being the same, but are supposed to function similarly.
Molecular biology has advanced so rapidly in the last decade that what was considered impossible became possible. Genetic manipulation of specific genes has allowed to produce birds with extra normal wings and extra normal legs.
Moreover, the great variation in beak morphology, which has been the source of great interest to students of evolution, has turned out to be directed by simple proteins. Beak evolution has been recreated in the laboratory by modifying the bills of ducks and finches.
Zebra Finch Chicken Genome Galapagos Island Chicken Gene Tree Finch
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