Difference between revisions of "Macroevolution"
(Improve footnote. There's nothing "unreliable" about the source, unless you are bigoted against creationism.) |
(expanded article) |
||
| Line 1: | Line 1: | ||
| − | '''Macroevolution''' is the theory that [[natural selection]] can, given enough time, lead to the creation of new [[clade]]s which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor. Macroevolution | + | '''Macroevolution''' is the theory that [[natural selection]] can, given enough time, lead to the creation of new [[clade]]s which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor. Macroevolution may require a large number of mutations, though it may also come about as a result of a gross genetic change. For instance, there are two species of grey tree frogs in North America; one has two sets of chromosomes, and one has four. From an evolutionary perspective, this is the result of a random failure in meiosis in a generation of tree frogs which led to a new genetic makeup for one of the species. |
| + | |||
| + | The scientific data regarding mutations causing the changes necessary for macroevolution has been seen by some as damaging to the macroevolutionary position. <ref>Bergman, Jerry, [http://www.trueorigin.org/mutations01.asp Darwinism and the Deterioration of the Genome], ''Creation Research Society Quarterly 42(2), 2005''.</ref> | ||
==See also== | ==See also== | ||
Revision as of 23:57, October 24, 2008
Macroevolution is the theory that natural selection can, given enough time, lead to the creation of new clades which are groups of organisms consisting of a single common ancestor and all the descendants of that ancestor. Macroevolution may require a large number of mutations, though it may also come about as a result of a gross genetic change. For instance, there are two species of grey tree frogs in North America; one has two sets of chromosomes, and one has four. From an evolutionary perspective, this is the result of a random failure in meiosis in a generation of tree frogs which led to a new genetic makeup for one of the species.
The scientific data regarding mutations causing the changes necessary for macroevolution has been seen by some as damaging to the macroevolutionary position. [1]
See also
External Links
References
- ↑ Bergman, Jerry, Darwinism and the Deterioration of the Genome, Creation Research Society Quarterly 42(2), 2005.