نتایج جستجو برای: f factor
تعداد نتایج: 1112465 فیلتر نتایج به سال:
The presence in Escherichia coli strains of derepressed sex factors determining F-type pili formation was found to increase their sensitivity to macarbomycin.
Differences between sexes in cognitive processes are widespread in humans and permeate many, if not most, cognitive domains. In animal cognition research, however, possible sex differences are still often neglected. Here, we provide striking evidence for a sex-specific response in an object permanence task in domestic dogs (Canis familiaris). Female dogs responded with significantly increased l...
The diversity and patchy phylogenetic distribution of genetic sex-determining mechanisms observed in some taxa is thought to have arisen by the addition, modification, or replacement of regulators at the upstream end of the sex-determining pathway. Here, I review the various evolutionary forces acting on upstream regulators of sexual development that can cause transitions between sex-determinin...
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