Ine schreef:
Ik blijf het allemaal maar moeilijke materie vinden, maar blijf meelezen!
We zullen het nog iets moeilijker maken.
Enkele commentaren van Ray Coppinger ivm "Development of Breeds" met o.a. een verwijzing naar hd:
Talking about genes for things is a past idea which a lot of the world
-- vets for example, haven't picked up on yet. Genes code for enzymes
which assemble amino acids into proteins which are organized into
structures Behavior is structure moving through time and space. Even
the structure itself is not produced by a gene map but rather a cascade
of developmental events where some events are the trigger for those
coming later in the sequence . Thus some structures are "caused" by the
preceding events and are themselves epigenetic. Thus traits like hip
dysplasia are not genetic in the sense that genes cause them. It is
just that in some environments such as over feeding too rich food the
cascade of events produce a hip that maybe species typical in that
environment, but one you don't like . There is more than one phenotypic
outcome for the same set of genes, thus more than one species typical
or behavioral phenotype per geneotype
Ray
Zijn verduidelijking over het bovenstaande:
Try this
All behavior is genetic! All behavior is (gene)tic.
What do genes do?
Genes code for enzymes that taking amino acids from the environment
organize those amino acids into Proteins -- Then a miracle happens.
The proteins are organized into structures.
Gene -> enzyme -> (AA) -> protein -> (miracle) -> structure (organ).
For me structure and behavior are the same thing. Behavior is
structures moving through time and space.
Now what is the miracle -- Answer: it is a cascade of chemical and
physical interactions. Are they genetic? Not exactly If there
weren't genes the cascade wouldn't have happened. But the resulting
shape of the cascade is a result of all the physical properties of the
interacting material - how much protein and how many amino acids at what
timing and at what temperature and with what other environmental
stimulation.
Heavy stuff!
Ray
Groetjes
Luc