Phinehas2 said:
Beechwell said:
If it could be shown that the genetic code of a fruit-fly can be transformed into the genetic code of a donkey, using only genetic changes/mutations that are directly observable (dna duplication, dna translocation, chromosomal aberrations...), would you accept that of proof that such an evolution is at least theoretically possible?
Of course.
Great
I admit I don't know that much about genetics, but I'll try to outline a basic proof here. Please correct me where I go wrong
If we reduce the problem to DNA for the moment, the difference between fruit-fly and donkey genetic information should be in
1) Sequence of amino acids within each chromosome
2) Number and shape of chromosomes.
So we'll just have to prove that both differences 1) and 2) can be annihilated by known mutations.
I think it is obvious that through deletion, duplication, inversion and translocation of individual nucleotide sequences within one strand of DNA one can transform any sequence into any other sequence consisting of the same amino acids. Simple deletion, duplication and translocation of individual nucleotides is already sufficient for this.
So point 1) should be no problem. Each dna sequence can be transormed into any other one using the same nucleotides.
We also know instances of additional chromosomes being created in chromosomal disorders (like Down syndrome). So the number of chromosomes can be changed as well.
I'm not quite sure about chromosomes changing shape, but at least the length and number of arms of a chromosome can change simply by deletion or translocation of large nucleotide sequences. I'm not sure we need more that than when staying within the kingdom of animals.
So, Phinehas: Any point so far you disagree on or find problematic?