Ceo Founder Ne Demek

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Christin Baus

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Jun 30, 2024, 11:10:50 AM6/30/24

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Kristina Demek, FDN-P is the founder and CEO of Agile Wellness Solutions. She is a Functional Wellness & Life Coach who assists women in aligning their immune system with their physical, energetic, mental, intuitive, and spiritual bodies for resiliency and vitality.

ceo founder ne demek

DESCARGAR ———>>> https://www.google.com/url?hl=en&q=https://urlin.us/2yPHnp&source=gmail&ust=1719846647754000&usg=AOvVaw2XA4xp69L4LrQKE6LS7P2G

Kristina draws from her own personal healing journey with Lyme, mold, heavy metals, and viruses and her education and training to bring a multi-modal approach in working with clients. Her mission is to educate and empower individuals to tap into their own inner healing wisdom to obtain optimum wellness.

In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942,[1] using existing theoretical work by those such as Sewall Wright.[2] As a result of the loss of genetic variation, the new population may be distinctively different, both genotypically and phenotypically, from the parent population from which it is derived. In extreme cases, the founder effect is thought to lead to the speciation and subsequent evolution of new species.[3]

In the figure shown, the original population has nearly equal numbers of blue and red individuals. The three smaller founder populations show that one or the other color may predominate (founder effect), due to random sampling of the original population. A population bottleneck may also cause a founder effect, though it is not strictly a new population.

Founder mutations originate in long stretches of DNA on a single chromosome; indeed, the original haplotype is the whole chromosome. As the generations progress, the proportion of the haplotype that is common to all carriers of the mutation is shortened (due to genetic recombination). This shortening allows scientists to roughly estimate the age of the mutation.[12]

The founder effect is a type of genetic drift, occurring when a small group in a population splinters off from the original population and forms a new one. The new colony may have less genetic variation than the original population, and through the random sampling of alleles during reproduction of subsequent generations, continue rapidly towards fixation. The homozygosity increase can be calculated as Δ f = 1 / 2 N \displaystyle \Delta f=1/2N , where f \displaystyle f equals inbreeding coefficient and N \displaystyle N equals population size.[13] This consequence of inbreeding makes the colony more vulnerable to extinction.[14]

The variation in gene frequency between the original population and colony may also trigger the two groups to diverge significantly over the course of many generations. As the variance, or genetic distance, increases, the two separated populations may become distinctively different, both genetically and phenotypically, although not only genetic drift, but also natural selection, gene flow and mutation all contribute to this divergence. This potential for relatively rapid changes in the colony's gene frequency led most scientists to consider the founder effect (and by extension, genetic drift) a significant driving force in the evolution of new species. Sewall Wright was the first to attach this significance to random drift and small, newly isolated populations with his shifting balance theory of speciation.[16] Following behind Wright, Ernst Mayr created many persuasive models to show that the decline in genetic variation and small population size accompanying the founder effect were critically important for new species to develop.[17] However, much less support for this view is shown today, since the hypothesis has been tested repeatedly through experimental research, and the results have been equivocal at best.[further explanation needed] Speciation by genetic drift is a specific case of peripatric speciation which in itself occurs in rare instances.[18] It takes place when a random change in genetic frequency of population favours the survival of a few organisms of the species with rare genes which cause reproductive mutation. These surviving organisms then breed among themselves over a long period of time to create a whole new species whose reproductive systems or behaviors are no longer compatible with the original population. [further explanation needed][19]

Serial founder effects have occurred when populations migrate over long distances. Such long-distance migrations typically involve relatively rapid movements followed by periods of settlement. The populations in each migration carry only a subset of the genetic diversity carried from previous migrations. As a result, genetic differentiation tends to increase with geographic distance as described by the "isolation by distance" model.[20] The migration of humans out of Africa is characterized by serial founder effects.[21] Africa has the highest degree of human genetic diversity of any continent, which is consistent with an African origin of modern humans.[22]

However, not all founder effect studies are initiated after a natural disaster; some scientists study the reinstatement of a species that became locally extinct or hadn't existed there before. A study has been in place since 1958 studying the wolf/moose interaction on Isle Royale in Lake Superior after those animals naturally migrated there, perhaps on winter ice. Hajji and others, and Hundertmark & Van Daele, studied the current population statuses of past founder effects in Corsican red deer and Alaskan elk, respectively. Corsican red deer are still listed as an endangered species, decades after a severe bottleneck. They inhabit the Tyrrhenian islands and surrounding mainlands currently, and before the bottleneck, but Hajji and others wanted to know how the deer originally got to the islands, and from what parent population or species they were derived. Through molecular analysis, they were able to determine a possible lineage, with red deer from the islands of Corsica and Sardinia being the most related to one another. These results are promising, as the island of Corsica was repopulated with red deer from the Sardinian island after the original Corsican red deer population became extinct, and the deer now inhabiting the island of Corsica are diverging from those inhabiting Sardinia.[26][27]

Kolbe and others set up a pair of genetically sequenced and morphologically examined lizards on seven small islands to watch each new population's growth and adaptation to its new environment. Specifically, they were looking at the effects on limb length and perch width, both widely varying phenotypic ranges in the parent population. Unfortunately, immigration did occur, but the founder effect and adaptive differentiation, which could eventually lead to peripatric speciation, were statistically and biologically significant between the island populations after a few years. The authors also point out that although adaptive differentiation is significant, the differences between island populations best reflect the differences between founders and their genetic diversity that has been passed down through the generations.[28]

It was found by Tarr et al. (1998) that the loss of heterozygosity of the Laysan finch (Telespiza cantans) after founding events on small islands in the Pacific Ocean closely matched theoretical calculations upon examination of microsatellite loci.[30]

Genetic studies of founder effect have concentrated on discovering ancestral and novel genetic diseases caused by founder effect and, to a lesser degree, on ancestry-related founder effects on populations, races, and ancient migrations, as well other aspects. The founder population could be the common ancestry of race or ethnicity or the forced localizations caused by artificial countries inside the larger group of ancestry, hence causing an original founder effect.[clarification needed] Race and specific founder effect mutation diseases are found in all races or ethnicities,[citation needed] and country-specific mutation diseases are caused by increasing homozygosity (the existence of same gene on both chromosomes pairs, hence a recessive disease may increase in just few generations). The genetic abnormality will increase incrementally with the decrease of number of isolated populations making tribe-specific diseases (such as Ashkenazis, Amish, and Bedouins) and novel genetic defects.[31]In recessive diseases, founder populations where underlying levels of genome-wide homozygosity are high due to shared common ancestry, but also for consanguineous populations that will have large genome-wide homozygous regions due to inbreeding. Having a catalog of disease-associated variation in these populations enables rapid, early, and accurate diagnoses that may improve patient outcomes due to informed clinical management and early interventions. Enclosed communities such as Amish communities, Ashkenazi communities, and relatively isolated islands allow scientists to better understand and further discover the mutated genes that cause these rare diseases and allow them to also discover protective genes as well.[32]

Due to various migrations throughout human history, founder effects are somewhat common among humans in different times and places. The French Canadians of Quebec are a classical example of founder population. Over 150 years of French colonization, between 1608 and 1760, an estimated 8,500 pioneers married and left at least one descendant on the territory.[33] Following the takeover of the colony by the British crown in 1760, immigration from France effectively stopped, but descendants of French settlers continued to grow in number mainly due to their high fertility rate. Intermarriage occurred mostly with the deported Acadians and migrants coming from the British Isles. Since the 20th century, immigration in Quebec and mixing of French Canadians involve people from all over the world. While the French Canadians of Quebec today may be partly of other ancestries, the genetic contribution of the original French founders is predominant, explaining about 90% of regional gene pools, while Acadian (descended from other French settlers in eastern Canada) admixtures contributing 4% British and 2% Native American and other groups contributing less.[34]