نتایج جستجو برای: sexual diversity
تعداد نتایج: 302358 فیلتر نتایج به سال:
Researchers and theorists who attempt to generalize about sexuality and sexual orientation in both men and women simultaneously often take male experiences as the norm and ignore unique aspects of women’s lives. The purpose of this issue is to focus attention on scientific research and theory about aspects of women’s sexualities, with special emphasis on sexual orientation. A new paradigm is pr...
Explaining the overwhelming success of sex among eukaryotes is difficult given the obvious costs of sex relative to asexuality. Different studies have shown that sex can provide benefits in spatially heterogeneous environments under specific conditions, but whether spatial heterogeneity commonly contributes to the maintenance of sex in natural populations remains unknown. We experimentally mani...
Genetic diversity in populations of invasive species is influenced by a variety of factors including reproductive systems, ploidy level, stochastic forces associated with colonization and multiple introductions followed by admixture. Here, we compare genetic variation in native and introduced populations of the clonal plant Oxalis pes-caprae to investigate the influence of reproductive mode and...
BACKGROUND A genetic bottleneck is known to exist for human immunodeficiency virus (HIV) at the point of sexual transmission. However, the nature of this bottleneck and its effect on viral diversity over time is unclear. METHODS Interhost and intrahost HIV diversity was analyzed in a stable population in Rakai, Uganda, from 1994 to 2002. HIV-1 envelope sequences from both individuals in initi...
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