In those cases, heterothallism (mating occurs only between compatible individuals carrying different MAT alleles [ 16]), is replaced by the ability of a single clone to form sexual structures and reproduce sexually.
A significant bias towards the self-fertile mating type was observed in all single ascospore masses taken from sexual structures produced in haploid-selfed cultures.
It suggests that men vied for reproductive success at the level of sperm competition as well as in other ways and that in this respect human social and sexual structure has been closer to the chimpanzee model than the gorilla one.
Feminists stress the "importance of men and women to social life, the connectedness of structures and processes found in macro and micro settings" as do evolutionists, who emphasize the influence of ecology and social configurations on family and sexual structures between men and women (Fox and Murry 2000, p. 1160; Hrdy 1981).
The species relies entirely on vegetative means to reproduce, and is not known to have any sexual structures.
Differences also exist between fungal groups and can be used to discriminate species by morphological differences in sexual structures and reproductive strategies.
In the sexual stage, the mold changes color, progressing from yellow-brown to brown, greenish-brown and eventually black as it makes perithecia, asci-containing sexual structures that produce ascospores.
The major fungal groupings have initially been delineated based on the morphology of their sexual structures and spores; for example, the spore-containing structures, asci and basidia, can be used in the identification of ascomycetes and basidiomycetes, respectively.
The sexual structure of the model is simply represented by splitting classes S and I into two sub-classes, one for each sex.
The dikaryotic hyphae differentiate into basidia, sac-shaped sexual structures where karyogamy and meiosis occur, resulting in the production of haploid spores called basidiospores.
