Sex selection

Tail colour in Guppies What selection pressures affect the spot brightness in guppies? Introduction Guppies are mostly known for being brilliantly coloured aquarium fish and are one of the world’s most widely distributed tropical fish due to its striking appearance. In the wild Poecilia reticulata (aka Guppies) are native to Northeastern Venezuela and are a highly adaptable fish that are able to survive a range of different ecological conditions, therefore, inhibit many environments. Males of this

Sex allocation refers to the amount of parental resources assigned to male versus female offspring in a sexually reproducing species {Charnov:1982wg, Brunet:1992fg,West:2010ws} and the extent of this allocation in the organism 's fitness. In angiosperms, the flowers are the reproductive organs, but opposite to most animals, the presence of male and female organs varies among species resulting in a large diversity of breeding systems. Those breeding systems are defined on the basis of the presence

Utilitarianism is the moral theory that emphasizes “the greatest happiness for the greatest number” (Clark, Poortenga, 2003). John Stuart Mill was a philosopher who believed in the principles of utilitarianism. He believed that humans desire for happiness and pleasure; therefore humans would be motivated to act morally in order to obtain that happiness (Clark, Poortenga, 2003). Mill’s approach has strengths, weaknesses, and is not fully equipped to hold true for all circumstances. Mill’s approach

Using preimplantation gender selection is a well-known practice in the twenty-first century to select the sex of a child, but the ethical issues behind it raise many questions to the public. As stated in the “A Question of Gender: Sex Selection in Humans” essay, there are many ambivalent arguments for and against the use of the preimplantation gender selection (PGS). As stated in the essay, selecting the sex of a child to reduce health problems (X-linked diseases) and also reduce the family’s suffering

gender plays a key role in the selection of physical qualities. It has been identified that animals of male gender have more dynamic physical characteristics than the female gender. Female animals are usually one drab color, without any significant physical qualities. This concept is called sexual selection. What exactly is the concept of sexual selection, and what is its purpose in the animal kingdom? Sexual selection is defined as “a form of natural selection in which, according to Darwin’s

AbstractIn this paper will discuss the sexual selection theory and gender role theory. Then, what are the main principles of each theory? Additionally, what position is taken by each theory on the origins, development, and causal mechanisms of aggression? Moreover, give an example of aggressive behavior that may be explained from the perspective of sexual selection and from the perspective of social role theory that is not covered in the reading. Furthermore, discuss at least on psychological phenomenon

Behavior Involved in Mate Selection and Attraction Reproduction in Homo sapiens, as in all animals, is a primary driving force and has been elaborated upon since the beginnings of society. Humans must take part in sexual reproduction to produce offspring, thus initiation behaviors can be studied. Commonly, the male makes advances and the female is the selector, or chooses the mate. For humans, this holds true and behavior is modified to maximize competitive receptability. This phenomenon

Paul Johnson held Charles Darwin in very high regard, calling him a “gentleman scientist” many times throughout his analysis. Overall he saw Darwin as inquisitive and conscientious of the world around him; often not publishing anything that would cause an uproar in the public or the church. Johnson also praises Darwin's ability to work in many different fields of science going as far at to call Darwin a shavnt, or someone with an extreme ability and intelligence who often times burdened with a severe

Throughout decades, sexual selection has been acknowledged in the explanation of evolutionary patterns. With research, we have had the opportunity to study species of animals like the Syngnathidae family. Animals that are included in this category include pipefish, seahorses, and sea dragons. This species is known for their sex role reversal, meaning that the male fertilizes and carries the eggs during incubation after the female has laid them. When we look more specifically at the pipefish, it is

Mate selection is an evolutionary process in which selection is dependent on the attractiveness of an individual’s phenotypic trait, such as age and sex. For example, women feel that reliability, dominance, wealth and generosity are important in a mate, while men believe attractiveness and creativity are important. Women investment more time in searching for a mate because women are, typically, responsible for birthing and raising a child and need a mate that would protect her and their offspring