thoughts

Showing posts with label genetics. Show all posts
Showing posts with label genetics. Show all posts

2007-09-12

lamarck and lysenko (old post)

Jean-Baptiste Pierre Antoine de Monet Chevalier de Lamarck, (of course) was a french biologist, who championed the idea of the inheritance of acquired characterstics. however, he did this in the early 1800's, with his original publication, Philosophie Zoologique, dated 1809.

read on...




the 'cat' experiment, as discussed in class was originally cited by Mr. St. George Mivart in his book "The Cat" (1881). He mentioned a case where a female cat had her tail badly injured when a cart-wheel ran over it and the owner judged it best to amputate the whole tail. Since then, the female had had two litters of kittens, and in each litter some of the kittens had a stump of tail, while the others had full-length tails.


as far as russia goes: i intended to refer to lysenko, who revived the long-discarded ideas of lamarkism in russia. indeed, genetics had been declared a 'bourgeois pseudoscience' in the Soviet Union in 1948 which persisted though the mid 1960s, lysenkoism was found to have caused mass starvation and serious, long-term harm to Soviet agriculture -- though it appeased the communist rulers of the time.


i won't even go into the manx cat... but, will note that the nytimes has an excellent section on evolution in todays paper!

2007-09-04

just when you thought it was safe to -omic



there is an interesting set of articles surrounding the individual
genome sequencing of craig.venter and jim.watson!

i really can't decide if this is extreme
open-sourcing
; or, just a sophisticated way of mooning
the universe...

either way, it borders on the ... (dare i type it?!?) .. c-omic-al ...

2007-05-11

P = G + E

and here i thought i might have a minority point of view!

not according to:

1) Science
The etiology of most chronic human diseases (such as asthma, atherosclerosis, and cancer) is complex, involving a mix of genetic and environmental factors interacting with each other over hours, days, months, or years.
and

2) PLOS

wow.

Technorati Tags: ,

2007-05-08

genes and diets and fat, oh my!

at the same time that Consumer Reports rates Dr. Barbara Rolls' (a fellow faculty member here at Penn State) book "The Volumetrics Eating Plan" the top-rated diet plan. the NYTimes (Genes Take Charge, and Diets Fall by the Wayside - New York Times ) suggests:

... that once a person got fat, the body would adjust, making it hopeless to lose weight and keep it off.

meaning that genes are more important that ANY diet in determining a persons body weight and/or level of obesity.

oh my! what to believe... ?!?

as anyone in my genetics course could tell you, neither argument is really correct. a person's body weight is a function of both genes AND environment (including nutrition, dietary choices and habits). there is NO single diet for every combination of genes (or person); no panacea.

though, it is fairly clear that for most of us: less is more.

oh yeah; try walking around the block now and again.


Powered by ScribeFire.