Joined: April 2005
|Cite one piece, just one piece, of empirical data that links the changes in allele frequency that occurs under selection and the appearance of new structures, processes or adaptations.|
Minor quibble: Remember I said that these changes do not need to occur by selection - drift is also a mechanism of evolution.
But anyway, your example of the evolution of a new structure, adaptation or process is the evolution of nylonases in bacteria.
Negoro, S., Biodegradation of nylon oligomers (2000), Appl. Microbiol.
Kato K, Ohtsuki K, Koda Y, Maekawa T, Yomo T, Negoro S, and Urabe I.
(1995 Oct). A plasmid encoding enzymes for nylon oligomer degradation:
nucleotide sequence and analysis of pOAD2. Microbiology , 141 ( Pt
Prijambada ID, Negoro S, Yomo T, and Urabe I. (1995 May). Emergence
of nylon oligomer degradation enzymes in Pseudomonas aeruginosa PAO
through experimental evolution. Appl Environ Microbiol , 61, 2020-2.
Yomo, T., Urabe, I. and Okada, H., (1992) No stop codons in the
antisense strands of the genes for nylon oligomer degradation,
Proceedings of the National Academy of Sciences USA 89, 3780-3784.
Kato K, Fujiyama K, Hatanaka HS, Priyambada ID, Negoro S, Urabe I, and
Okada H. (1991 Aug 15). Amino acid alterations essential for
increasing the catalytic activity of the nylon-oligomer-degradation
enzyme of Flavobacterium sp. Eur J Biochem , 200, 165-9.
Ohno S. (1984 Apr). Birth of a unique enzyme from an alternative
reading frame of the preexisted, internally repetitious coding
sequence. Proc Natl Acad Sci U S A , 81, 2421-5