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Sexual selection creates colourful differences between sexes in Goldie's bird-of-paradise.Male above; female below. Painting by John Gerrard Keulemans.. Sexual selection is a mechanism of evolution in which members of one sex choose mates of the other sex to mate with (intersexual selection), and compete with members of the same sex for access to members of the opposite sex (intrasexual ...
Commitment and marriage: A human male may be interested in mating with a female who seeks marriage. [8] This is because he has exclusive sexual access to the female, so any offspring produced in the relationship will be genetically related to him (unless the female has sexual intercourse with another male outside of the marriage).
The pelvis is, in general, different between the human female and male skeleton. [14] [15] Although variations exist and there may be a degree of overlap between typically male or female traits, [14] [15] the pelvis is the most dimorphic bone of the human skeleton and is therefore likely to be accurate when using it to ascertain a person's sex ...
The findings of these studies have often been applied across the sexes and healthcare providers have assumed a uniform approach in treating both male and female patients. More recently, medical research has started to understand the importance of taking the sex into account as the symptoms and responses to medical treatment may be very ...
During courtship, males actively search for females; [27] if a male finds a female, he slowly circles around the female whilst trembling his first and second leg near her. [ 25 ] [ 26 ] Male leg-trembling causes females (who were in the "net stance") to orient towards and often to clutch the male. [ 25 ]
Male investment means that males are also selective, and thus, female ornaments have evolved to address this. Parental investment does not explain the interest in the ability to provide resources since the parental investment in long-term mating is similar and, therefore, the selectiveness is too.
Wikipedia:Wiki-Link Game – fun with the Random article feature; Wikipedia:Enhanced Random Article – custom script; randomlink.js – tool to follow a random link or go to a random page in a category, list or WikiProject; Special:RandomInCategory; Template:Random page in category; Wikimedia sister projects. Wikiversity:Random; Wiktionary ...
Robert Stoller, whose work was the first to treat sex and gender as "two different orders of data", in his book Sex and Gender: The Development of Masculinity and Femininity, [45] uses the term 'sex' to refer to the "male or the female sex and the component biological parts that determine whether one is a male or a female". [46]