opelmanta1900 wrote:That's a serious question... i understand it's because of phenotypic plasticity, just don't understand how it can make living things with the Dane genetics so different...
So... "phenotypic plasticity" is a funny term. It has a really really broad application.
you know the difference between phenotype and genotype?
Genotype is your genetics. Your genotype is the blueprints... it never changes.
Phenotype is the expression of the genetics... ie "black hair" "blue eyes" "short" "tall".... these are all driven by the genetics, but there may be different genes expressed at different times which may change your phenotype.
The interesting examples of "phenotypic plasticity" are large scale changes to an organism due to huge sequences of new genes being expressed....
- in bacteria, the upregulation of an entire new sugar metabolism pathway (galactose) beause of the prevalence of that sugar in the environment
- I believe there are certain temperature dependent changes.. I think bear hibernation may be an example, as entire metabolic pathways change due to environmental changes (cold)
- The growth of a "winter pelt" which is then shed is a phenotypic pathway change. Those are different genes that are turning on or off
- I believe birds molting from one color as youths to a different color as adults is a phenotypic plasticity ....
But... that same cool term can be used for really basic, dumb ideas we all know about.
malnutrition....
Don't feed some things and that stunts development. If you're depending on your plants to all grow at the same rate they have to get the same nutrition... technically speaking, if one is not getting the same amount of nutrition, then the gene pathways for maturation may trigger later. Technically that's a different phenotype.... but not in the more interesting way that we think of... more in a "take two twins, raise one on meat and the other on bread and water and no sun.. see how they turn out"