AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
|
|||||||
The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
|||||||
STUDIA BIOLOGIA - Issue no. 2 / 2006 | |||||||
Article: |
ASPECTS OF THE EVOLUTIONARY PROCESS IN SMALL POPULATIONS. Authors: NICOLAE COMAN, MANUELA DORDEA. |
||||||
Abstract: The Hardy-Weinberg law refers to extremely large populations, where allele and genotype frequencies remain constant from one generation to another, provided that there were no perturbing outside forces, such as selection or migration. Such populations are hypothetical and do not evolve. In smaller populations, allele and genotype frequencies do change over time, because of sampling errors, increase in selection pressure and inbreeding. Consequently, small populations might survive, go to extinction or join other conspecific populations as immigrants. Based on literature as well as on our own research studies, the present paper is a review regarding the effects of population size fluctuations, genetic drift, the founder effect, migration and inbreeding, mechanisms that work in small populations and may cause changes in gene pools, followed by modifications of selection pressures and, implicitly, by evolution. | |||||||