Sexual selection

Selection is the functional relationship between phenotypes and fitness. Natural selection is the production of organisms according to their physical attributes whereby off springs of the younger generations takes the strong, desired and inheritable aspects of their parents. They become more adapted to the environment although some does well than others according to their individual traits which are attributed to their phenotypes (Sinervo, 1997). According to Charles Darwin, fitness can be described

Module: Evolutionary Biology ZO317 Sexual selection in fish inhabiting great lakes Sexual selection can best be described by the definition given by Darwin himself. Sexual selection is “the advantage which certain individuals have over other individuals of the same species solely in respect of reproduction” (Hosken et al, 2011). Sexual selection occurs throughout the animal kingdom, where male frogs dominate through the depth of their croak

This article focuses on the evolution of sexual differences in insects. Intense sexual selection due to competition for mates is the main driving force behind the evolution of such variations. Males produce smaller and more numerous gametes than females and often competition between males is greater than that between females. It is suggested by the authors that the material contribution by each of sexes to the next generation is what determines the reproductive rate of the population. In an instances

Sexual selection was an idea proposed by Darwin and refers to the process in which males and females attempt to maximize their chances of reproductive success. Within a species there are certain characteristics that make individuals attractive to potential mates. An example of this is in peacocks, female peacocks are attracted to males with long brightly colored tails, even though this makes them easier to be spotted by predators. This characteristic then evolves within the species due to how males

What is sexual selection? Sexual selection is the natural selection arising through preference by one sex for certain characteristics in individuals of the other sex. This means they are copulating with their other mate. Sexual selection can be dangerous in some cases depending on the rate and length of copulating. It can be so harmful to species that they may not be able to survive from it afterwards. Charles Darwin distinguished sexual selection and its various ways. He realized that sexual

Darwin’s theory is in regards to natural selection and sexual selection. The gorilla is an animal that uses the two selections to determine their protection, feeding, and reproduction. First Charles Darwin described the characteristics and structures that a animal like a gorilla is born with. He states that these characters and structures will have slow changes that will be different than when they were born. Then he believes that they will have characters and structures that are trifling important

characterized sexual selection as “variance in the number of mates”. The purpose of sexual selection is to perfect the secondary sexual characteristics, which are the morphological differences between the two sexes. On the other hand the primary sexual characteristics are the differences between the reproductive genital systems of the two sexes. Sexual selection instead of adapting the individual to the environment, like natural selection, it does enhance traits involved in mate acquisition. Sexual conflict

The matter of Natural Selection was brought forth by Charles Darwin and with that evolved the concept of Sexual Selection. The first thing that may come to mind is male preference in females for reproductive purposes. It is quite common when thinking about the process of Natural Selection. We don’t typically take notice of Darwin’s recognition or acceptance for “female choice” upon mate selection and the role it plays in our evolution. Both males and females differentiate when it comes to parental

Sex Selection and Ethics Over the course of the semester the topic I felt that I analyzed and reflected upon most was sex selection. Sex selection is a topic that I knew very little about at the beginning of this semester, but I have come to learn a lot about and appreciate over these past few weeks. Sex selection refers to numerous methods that allow one to select the desired sex of their embryo. Technologies that include ultrasounds or prenatal testing followed by selective abortion, preimplantation

Sexual selection means many different things to many different individuals. Some may say that it can be defined by sex differences and others say that it is primarily the difference in male individuals. According to Charles Darwin, sexual selection can simply be defined as competition for mates. Competition for mates, mate choice, and courtship behavior are all closely related and provide evidence for sexual selection. They are all very common in sexual selection. They help with the process of evolution