Based on recent nuclear molecular genetic evidence, the first colonization of America has been characterized as a pre-Clovis single origin serial founding microevolutionary
process (Rothhammer and Dillehay 2009; Wang et al.
Although Ayala (2005) supported this idea, he indicated that the study of microevolutionary
phenomena is important to macroevolution, because any correct theory of macroevolution must be compatible with well-established microevolutionary
principles and theories.
(46) What they have in common is that all of the genetic studies reviewed in the following section point to an Asian origin for all Native Americans, with the understanding that Asian populations, like modern Native American populations, have gone through microevolutionary
changes since the time of the last common ancestor as well as population movement.
effects of relaxed selection from rattlesnakes.
This type of investigation is necessary to answer important questions such as why butterflies evolve to use a particular host plant of set of host plants, and what phenotypic and microevolutionary
alternatives are open to a population in exploiting the food plant resource.
One of the reasons why it has been difficult to bring microevolutionary
experiments into classrooms is the obvious tradeoff between choosing an allele that is strongly selected against, such as a lethal allele, and choosing one that is easy to visualize.
"My research may contribute to answering these questions, and perhaps increase knowledge of how algal blooms are affected by environmental changes and how the population dynamics of these algae appears in a microevolutionary
perspective," she said.
While the mark of Ancient Java may not be present in any of the fossil series from the Willandra, establishing a clearer understanding of the microevolutionary
processes that may have produced variation in Pleistocene Aboriginal Australians has the potential to inform the international community of the influence the extreme conditions of the Quaternary may have had on modern human morphology and diversity.
Responses to Directional Selection on Heritable Variation.
Testing inferences about microevolutionary
proceses by means of spatial autocorrelation analysis.
Many creationists will accept microevolutionary
changes within species as legitimate.
processes under natural conditions are usually subtle and often complex, but can be dramatic under artificially strong selection pressures, such as antibiotic resistance in bacteria, or breeding for a certain phenotype in plants and animals.