Search results
Results From The WOW.Com Content Network
Inbreeding avoidance, or the inbreeding avoidance hypothesis, is a concept in evolutionary biology that refers to the prevention of the harmful effects of inbreeding. Animals only rarely exhibit inbreeding avoidance. [ 1 ]
In evolutionary biology and psychology, such an ability is presumed to have evolved for inbreeding avoidance, [1] though animals do not typically avoid inbreeding. [2] An additional adaptive function sometimes posited for kin recognition is a role in kin selection. There is debate over this, since in strict theoretical terms kin recognition is ...
The avoidance of expression of such deleterious recessive alleles caused by inbreeding, via inbreeding avoidance mechanisms, is the main selective reason for outcrossing. [6] [7] Crossbreeding between populations sometimes has positive effects on fitness-related traits, [8] but also sometimes leads to negative effects known as outbreeding ...
The inbreeding avoidance hypothesis has been "ruled out as an explanation for the observed pattern of MHC-dependent mate preference" because relatedness is not associated with mate choice. [ 19 ] In the course of searching for potential mates, it would benefit females to be able to discriminate against "bad" genes in order to increase the ...
The Westermarck effect has gained some empirical support. [2] Proponents point to evidence from the Israeli kibbutz system, from the Chinese Shim-pua marriage customs, and from closely related families.
Numerous inbreeding avoidance mechanisms operating prior to mating have been described. However, inbreeding avoidance mechanisms that operate subsequent to copulation are less well known. In guppies, a post-copulatory mechanism of inbreeding avoidance occurs based on competition between sperm of rival males for achieving fertilization. [55]
Inbreeding ordinarily has negative fitness consequences (inbreeding depression), and as a result species have evolved mechanisms to avoid inbreeding. Numerous inbreeding avoidance mechanisms operating before mating have been described. However, inbreeding avoidance mechanisms that operate after copulation are less well known.
Being able to identify your mate is not all, recognition can also help in the context of mate selection as individual recognition allows birds to avoid inbreeding with conspecifics. [5] Inbreeding avoidance has been shown in a species of storm petrel, a colonial seabird that nests in burrows. In the case of storm petrels, individual relatedness ...