Makroevo! Tod. rakennnemuutoksesta mutaatioin
Tämä päivä voi olla yhtä merkittävä kuin Archaopteryxin, valaiden
välimuotojen tai semmoisen löytäminen, kun ollaan
makroevoluution mekanismien
salaisuuksien paljastumisen äärellä:
http://ucsdnews.ucsd.edu/newsrel/science/mchox.htm
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EMBARGOED UNTIL February 6, 2002, 11 a.m. Pacific Time (2 p.m. ET)
FIRST GENETIC EVIDENCE UNCOVERED OF HOW MAJOR CHANGES
IN BODY SHAPES OCCURRED DURING EARLY ANIMAL EVOLUTION
Biologists at the University of California, San
Diego have uncovered the
first genetic evidence that explains how
large-scale alterations to body
plans were accomplished during the early evolution
of animals.
In an advance online publication February 6 by
Nature of a paper scheduled to appear in Nature, the scientists show
how mutations in regulatory genes that guide the embryonic
development of crustaceans and fruit flies allowed aquatic
crustacean-like arthropods, with limbs on
every segment of their bodies, to evolve 400
million years ago into a radically different body plan: the
terrestrial six-legged insects.
The achievement is a landmark in evolutionary biology, not
only because it shows how new animal
body plans could arise from a simple genetic mutation, but
because it effectively answers a major
criticism creationists had long leveled against
evolution-the absence of a genetic mechanism that
could permit animals to introduce radical new body designs.
"The problem for a long time has been over this issue of
macroevolution," says William McGinnis,
a professor in UCSD's Division of Biology who headed the
study. "How can evolution possibly
introduce big changes into an animal"s body shape and still
generate a living animal" Creationists
have argued that any big jump would result in a dead animal
that wouldn't be able to perpetuate
itself. And until now, no one's been able to demonstrate how
you could do that at the genetic
level with specific instructions in the genome."
...
(paljon tekstiä ja 2 kuvaa)
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Tämä päivä voi olla yhtä merkittävä kuin Archaopteryxin, valaiden
välimuotojen tai semmoisen löytäminen, kun ollaan
makroevoluution mekanismien
salaisuuksien paljastumisen äärellä:
http://ucsdnews.ucsd.edu/newsrel/science/mchox.htm
--------------------------------------------------------------
EMBARGOED UNTIL February 6, 2002, 11 a.m. Pacific Time (2 p.m. ET)
FIRST GENETIC EVIDENCE UNCOVERED OF HOW MAJOR CHANGES
IN BODY SHAPES OCCURRED DURING EARLY ANIMAL EVOLUTION
Biologists at the University of California, San
Diego have uncovered the
first genetic evidence that explains how
large-scale alterations to body
plans were accomplished during the early evolution
of animals.
In an advance online publication February 6 by
Nature of a paper scheduled to appear in Nature, the scientists show
how mutations in regulatory genes that guide the embryonic
development of crustaceans and fruit flies allowed aquatic
crustacean-like arthropods, with limbs on
every segment of their bodies, to evolve 400
million years ago into a radically different body plan: the
terrestrial six-legged insects.
The achievement is a landmark in evolutionary biology, not
only because it shows how new animal
body plans could arise from a simple genetic mutation, but
because it effectively answers a major
criticism creationists had long leveled against
evolution-the absence of a genetic mechanism that
could permit animals to introduce radical new body designs.
"The problem for a long time has been over this issue of
macroevolution," says William McGinnis,
a professor in UCSD's Division of Biology who headed the
study. "How can evolution possibly
introduce big changes into an animal"s body shape and still
generate a living animal" Creationists
have argued that any big jump would result in a dead animal
that wouldn't be able to perpetuate
itself. And until now, no one's been able to demonstrate how
you could do that at the genetic
level with specific instructions in the genome."
...
(paljon tekstiä ja 2 kuvaa)
-----------------------------------------------------
Vastaukset 6
Vanhimmat
Olisko niin, että makroevoluutio olis ollut hömppää tai kauniimmin sanottuna viisas arvaus tähän hetkeen asti?
No, oli miten oli, evoluutiohömppää riittää tämänkin jälkeen arvosteltavaksi (-;
Ainoa kohta, joka pisti silmiini, on tämä:
" "The problem for a long time has been over this issue of
macroevolution," says William McGinnis,
a professor in UCSD's Division of Biology who headed the
study. "How can evolution possibly
introduce big changes into an animal"s body shape and still
generate a living animal" Creationists
have argued that any big jump would result in a dead animal
that wouldn't be able to perpetuate
itself. And until now, no one's been able to demonstrate how
you could do that at the genetic
level with specific instructions in the genome."
Eikö evoluutioteoria ollutkaan ongelmaton kun nyt myönnetään, että kreationisteilla oli joissain väitteissä pointti? Mikä siis on ongelmallista evoluution kannalta ja mistä saisi ihan objektiivista informaatiota evoluutioteorian ongelmista? Valaisetkos?
Löytyy esim. näistä jotain
Laihonen:Evoluutio
Gould:Hirmulisko heinäsuovassa
Teorioissa ja soveltamisssa on aina jotain ongelmia, itse gravitaatio ja evoluutio on faktoja.
Evoluutio ei ole synonyymi evoluutioteorialle
terv. Mr.K.A.T.
Tutustun kyllä. Gouldista tiedänkin jotain.
Noh, vaikka tuo tulos ilmeisesti on merkittävä niin olen varma, että kreationistit yrittävät kierrellä tuosta tutkimuksesta jotenkin pois. Heidän ennakko-oletuksensahan jo estää evoluution toimivuuden myöntämisen.
Tämä ei sano mitään siitä ettei ulkopuolinen taho (esim. valvojat) olisi ollut asialla geenimanipuloimassa.
no nyt ovat alkaneet evolutionistit paikkaamaan ylipääsemättömiä aukkoja sanomalla "tämä aukoton kehitys" sen ja sen välillä. Niinhän siitä selvittiin. Eilinen dokumentti oli siitä hyvä esimerkki.