Genetic Drift and the Founder Effect Essay Example | Topics and Well Written Essays - 250 words

Genetic Drift and the Founder Effect - Essay Example This reduces variation in genetic characteristics with reduction in population size but retains the developed genetic frequencies as the population grows (Shulka, 2009). An example of the bottleneck effect is the case of white elephants that were protected from extinction. The resultant thousands of the species that originated from about 20 animals exhibits â€Å"no variations in 24 proteins† that significantly varied in the originally large population (Russel, Hertz and McMillan, 2011, p. 440). The founder effect, however, is characterized by movement of a small section of a population to a different locality. The reduced population leads to convergent traits that are retained within an internally growing population (Jurmain, Kilgore and Trevathan, 2008). An example is the â€Å"Old Order Amish of Lancaster County,† a small community that originated from a trio of immigrants. The emergent community however developed a convergent high frequency of â€Å"Ellis-van Creveld syndrome† leading to higher frequency and more significant dwarfism as compared to the original population (Russel, Hertz and McMillan, 2011, p.

Theory evolution Research Paper Example | Topics and Well Written Essays - 250 words

Theory evolution - Research Paper Example They emerged with a goal of strengthening the already existing methods. The original ideas had some weaknesses in their area of scope, field of coverage and failed to pinpoint in some of the most sensitive aspects that indeed can improve the process of understanding the adult theory. The alternative methods added some knowledge on adult learning, like, for example; they came up with other principles of adult education that got neglected by the original theories. These included the assumptions of self-concept, adult education experience, readiness to learn, orientation to learn and motivation to learn. These new assumptions that got added to the alternative theories brought an insight and knowledge on how to approach adult education (Jarvis & Jarvis, 2004). The alternative methods contributed other principles of Andragogy. The new laws gave other means through which the process of adult learning can get well comprehended (Flannery, 1993). These methods have brought in some insights towards understanding of the adult education. Scholars have gotten in a position to get awareness on the flexibility and dynamism that Andragogy exhibits over time (Merriam, 2008). Andragogy has further gotten understood as a process that has extreme differences in pedagogy, due to the different assumptions and principles that are parallel to those of