I have a couple of probably naive questions about the evolution of
gene structure in animals. Many homologous genes contain more exons and
thus are more fragmented in higher mammals than in lower animals.
First, is this a general tendency? Second, is this considered a result
of fragmentation of the gene during evolution or rather a structural
simplification in lower organisms?
I would be very grateful for any suggestion or indication of
references on this subject. Thank you,
sb9e at virginia.edu