Sex selection

Since the majority of our attention was on the broad aspects of intersexual and intrasexual selection, we failed to account for some of the other factors associated with the selection of a mate. As discovered in previous research on T. molitor, the use of sex pheromones appears to play a significant role in their mating process (Karlson and Luscher, 1959). By releasing and detecting chemical or hormonal signals, species are…

could happen is if they really prefer each other. Preferences for sexual reproduction started with Darwin when he proposed “sexual selection” rather than natural selection (Buss and Barnes, 1986). This occurred when Darwin saw an evolutionary change in peacocks that was not for survival, but to attract mates for reproduction (Buss and Barnes, 1986). Sexual selection is important in humans because that is how they obtain mates to pass down genes. Men compete for their partner, while women choose…

Dr. Roughgarden’s talk discusses the evolution of gender and sexuality. She challenges Darwin’s Sexual Selection Theory which suggests that males are created with a higher sexual drive than females are. Along with this idea, Darwin implies that females are attracted to males whose appearance is, in simple terms, beautiful. Dr. Roughgarden disagrees with this and offers some examples as to why this theory is false. One of the examples that most interested me was her explanation of homosexuality…

refers to a species distinct differences between the sexes resulting in distinct male and female forms. This is the sexual selection, adaptive changes in males and females often due to male competition and female selectivity. (Biology, Sylvia s mader and Michael winderlspecht pg 297 - 298). Usually this is the result of phenotype selection but, this is tied in with the selection of genotypes. Size and colorations of features in a mate may indicate features that are not readily observable. For…

They hypothesized that the difference in bill curvature between the sexes would be greater for the species with the longest bills and questioned if this dimorphism is formed through sexual selection or natural selection (Temeles, Miller, and Rifkin). This research is crucial because it could explain the diversity in hummingbird species and seeks to understand the forces that have and continue to shape the formation of…

masculinity (superheroes, cars, construction toys) and girls prefer dolls, toys on the feminine end of the spectrum (Alexander and Haines, 2002). The researchers believe this gap is a result of learning mechanisms that reinforce gender socialization in sex-typical play. In children, environmental and social factors are the culprit for their behavior towards the toys they play with, however in other species, it is merely biological factors as the main influence (Alexander and Haines, 2002).…

is in keeping with other sexually dimorphic species that engage in male competition (Puts 2010, p. 5). Furthermore, male skeletons are robust, and this is particularly so in regards to the facial region of the skull, which could be the result of selection pressure pushing in the direction of human males becoming more able to cope with violence, and thus blows to the face (Puts, 2010, p. 6). And, males have a greater tolerance for pain, which further supports the idea of an evolutionary pressure…

finding justice. We know that like race, gender matters. A plethora of studies make clear that in rape cases, for example, female jurors are somewhat more likely to vote to convict than male jurors. (Excerpts From Supreme Court Opinions on Sex as Jury-Selection Standard , 1994) Even though the Supreme Court took action in an attempt to sway attorneys from engaging in this practice, it still occurs today. Attorneys are fully aware, and purposely select those jurors that they feel will be more…

Gender differences in personality traits have been documented in many empirical studies. For instance, Maccoby and Jacklin (1974) conducted the first major review of research on sex-related differences in cognition, temperament, and social behaviour in children and adults. They concluded that men are more assertive and less anxious than women. However, there were no differences found for two other traits analysed, locus of control and self-esteem. The reason for such gender differences to exist…

With the advancement of technology that serves the purpose to overcome the problems of time and space. In the essay “Visible Man: Ethics in a World without Secrets”, Peter Singer states, “new technology has made greater openness possible” (Singer 463), has created an opportunity for people to gain more knowledge due to the access of information. Instead technology has resulted in a tool of misuse in society. In a global perspective, implications of gender imbalance have developed from easy…