Re: [evol-psych] Re: News: Cracking the epigenetic code, advancing our understanding of disease
On Oct 31, 2012 7:57 AM,
> An example sometimes given is the area of a rectangle. It is
> nonsensical to ask about the separate contributions of length and width
> to the area of a single rectangle because area is the product of length
> and width.
Come on, now. I am sure you can interpret this very easily
A = xy
dA = xdy + ydx
How much of the contribution to the change in A comes from change in x?
Obviously ydx. If x, y are genes and environment then the change in genes is multiplied by env.
Area does not exist without both length and width. [An
> organism does not exist without genes and environment.] However, if we
> ask, not about a single rectangle but about a population of rectangles,
> the variance in areas could be due entirely to length, entirely to
> width, or to both. Obviously, there can be no behavior without both an
> organisms [and its genes] and an environment. The scientifically useful
> question is the origins of differences among individuals.
> For example, the heritability of height is about 90 percent, but this
> does not mean that you grew to 90 percent of your height for reasons of
> heredity and that the other inches were added by the environment. What
> it means is that most of the height differences among individuals are
> due to the genetic differences among them. Heritability is a statistic
> that describes the contribution of genetic differences to observed
> differences among individuals in a particular population at a particular
> time. In different populations or at different times, environmental or
> genetic influences might differ, and the heritability estimates in such
> populations would differ" (Plomin et al, Behavioral Genetics, Fifth
> Edition, 2008, p. 85-6).
> --- In firstname.lastname@example.org, Edgar Owen
> <edgarowen@...> wrote:
> > Sonny,
> > Correction. Taller parents tend to have taller children and vice
> versa. Height IS CLEARLY HERITABLE.
> > Why would anyone think otherwise?
> > Edgar
- --- In email@example.com, "clarence_sonny_williams" <clarencew@...> wrote:
> I am confident that those who scoff at such scientific facts have aDWZ:
> hidden sociopolitical agenda in mind. It is a shame they are so
> cowardly about this sociopolitical agenda that they refuse to reveal it.
I wouldn't be surprised if they already have plans drawn up for a Gulag, so that when they seize power they will have a place to send the PC liberals. Fortunately, those dreams of power are about as plausible as their "scientific" theories.
Donald W. Zimmerman
Vancouver, BC, Canada