منابع مشابه
Sexual Dimorphism
S Vertebrates ” ( J. G. M. Thewissen , and S. Nummela , eds ) , pp. 211 – 224 . University of California Press , Berkeley . Pihlström , H. ( 2008 ). Comparative anatomy and physiology of chemical senses in aquatic mammals . In “ Sensory Evolution on the Threshold Adaptations in Secondarily Aquatic Vertebrates ” ( J. G. M. Thewissen , and S. Nummela , eds ) , pp. 95 – 109 . University of Califor...
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Several hypotheses have been proposed to explain the direction and extent of sexual size dimorphism in anurans (in which males are usually smaller than females) as a result of sexual selection. Here, we present an analysis to test the hypothesis that sexual dimorphism in anurans is largely a function of differences between the sexes in life-history strategies. Morphological and demographic data...
متن کاملWnt Signaling in Sexual Dimorphism.
The embryonic gonad of Drosophila melanogaster begins to display sexually dimorphic traits soon after its formation. Here we demonstrate the involvement of a wnt family ligand, wnt-2, in the induction of these sex-specific differences. We show that wnt-2 contributes to the survival of a male-specific population of somatic gonadal precursor cells (SGPs), the male-specific SGPs that are located a...
متن کاملSexual dimorphism in innate immunity.
OBJECTIVE To establish whether variation in innate immunity, as measured by the level of tumor necrosis factor (TNF) in lipopolysaccharide (LPS)-stimulated whole-blood culture, is related to sex or HLA. METHODS Normal volunteers (72 women, 159 men) completed questionnaires and donated peripheral blood specimens. Blood samples were exposed to LPS in a 4-hour in vitro culture, and supernatants ...
متن کاملSexual dimorphism in hybrids rats.
Laboratory rat strains descend from Wistar rats as a consequence of artificial selection. Previously we reported that the medial posterior division of the bed nucleus of the stria terminalis (BSTMP) was sexually dimorphic in Wistar and Long-Evans strains while the medial anterior division (BSTMA) and the locus coeruleus (LC) only showed sex differences in the ancestor Wistar strain. The lateral...
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ژورنال
عنوان ژورنال: Epidemiology and Infection
سال: 2007
ISSN: 0950-2688,1469-4409
DOI: 10.1017/s0950268807009934