What is intralocus interaction?
Conflict in which the antagonistic alleles are located at the same locus is termed intralocus sexual conflict. This occurs when males and females undergo different selective pressures at the same locus, resulting in either sex limiting the fitness of the other sex.
What is antagonistic selection?
Sexually antagonistic selection (SAS) occurs when the direction of natural selection on a trait, or a combination of traits, differs between the sexes.
What is a sexually antagonistic trait?
Sexually antagonistic selection (SAS) may promote genetic diversity in natural populations. SAS arises when an allele is beneficial to one sex but harmful to the other; that is, when a phenotypic trait has different optima in each sex but a shared genetic basis (9–14).
Is coevolution always antagonistic?
Coevolution does not necessarily require the presence of antagonism. The interactions or characteristics within groups of unrelated species may converge to allow individual species to exploit valuable resources or enjoy increased protection.
What causes antagonistic coevolution?
The theory of sexually antagonistic coevolution is based on the Red Queen process (15). In short, when males increase their reproductive success through an adaptation that is simultaneously detrimental to females, it creates selection for a counter-adaptation in females to regain their lost fitness.
What is it called when males fight over females?
Sexual conflict or sexual antagonism occurs when the two sexes have conflicting optimal fitness strategies concerning reproduction, particularly over the mode and frequency of mating, potentially leading to an evolutionary arms race between males and females.
What is the source of intersexual conflict?
The conflict occurs as the spread of an allele at one locus in either male or female that lowers the fitness of the other sex. This gives rise to different selection pressure on males and females.
What is intra about intrasexual selection?
Definition. Intra-sexual selection is part of sexual selection where members of the same sex (males) compete with each other to gain access to mate with females.
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