Evolution: Different Types of Selection Research Paper

Exclusively available on Available only on IvyPanda® Made by Human No AI

The genotype of the population is influenced to a great extent by natural selection and it is essentially the effect of the environment on the specific phenotype that describes the definition of the fittest. Specific genetic variation plays an important role in the prevailing genome so that the polygenic mannerisms and relevant characteristics function in uniformity. Polygenic inheritance enables the provision of a continuous mannerism of expressions like the color of hair.

Certain human species are polymorphic which means that some dominating phenotypes are commonly conveyed by the natural process. The selection by direction implies that a single phenotype is selected by ignoring other phenotype extremes.

This process enables the progeny of the extreme that is favored to indulge in reproductive activities more effectively thus creating dominance in the entire population. This enables the phenotypes of the succeeding generation to move in a specific direction due to the adoption of the process of natural selection. This process becomes quite common when the population takes over a new area or region and when the environment is transformed by way of, for example, herbicide applications brought about in the existing systems (Simpson, 1967).

This kind of directional selection accounts for some of the diseases becoming resistant to medicines that have been constantly used over time. Surprisingly, such an occurrence happens not because the related germs multiplied and became immune to the medicine, but because as the medicines are used over a period of time by a large population, the innate variables in the germs will breed germs that do not get impacted by the medicine.

In due course, the older germs die and the newer ones can survive the impact of the medicine and breed more germs that are resistant. Thus the phenotype of the given germ shifted to a course that was distinctively a result of the natural selection which functioned on and was in favor of the extreme phenotypes. Conversely, the diversifying selection process supports the phenotype extreme by ignoring the ranges of intermediate phenotypes.

The process of diversified selection creates different phenotypes which result in a booming breeding season within the population. The reverse situation of the diversifying selections is depicted by the stabilizing selection since it is in favor of the intermediate phenotypes at the cost of the different extremes. While the diversifying mechanisms signal a changed environment, stabilizing selections indicate a steady environment, which appears to lessen phenotypic variations (Moulton, 2004).

Sexual selection implies the fondness of a given mate over others and sometimes entails an effusive demonstration by way of a mating dance or graceful plumage. Sometimes the mental, physical, and overall size qualities can impact the decisions to pair off with a particular individual.

In contrasting distinction to the ambiguous and obscure behavior and in order to keep away from predation, such actions mostly are in the nature of being ostentatious irrespective of the possible damaging consequences, for example, the increasing levels of predation. As a result, some individuals will partner and send on their genes while others will not do so. The effect of this kind of selection is very strongly related to the diversifying and directional selections as it influences the overall arrangement of the populations.

Hence sexual selection becomes different in that the forms of selection are created by issues inside other members belonging to similar groups as against external events. When a particular phenotype is preferred over the other in terms of the biotic issues in the environment, inconsistent reproductive patterns are created for the entities in the given populations. Essentially survival of the fittest in this regard pertains to those individuals who can reproduce in the largest numbers. Therefore, success in reproduction becomes the essence of natural selection.

References

Moulton Glen, The Complete Idiot’s Guide to Biology, 2004, Alpha Publishers.

Simpson George Gaylord, The Meaning of Evolution, 1967, Yale University Press.

More related papers Related Essay Examples
Cite This paper
You're welcome to use this sample in your assignment. Be sure to cite it correctly

Reference

IvyPanda. (2021, November 5). Evolution: Different Types of Selection. https://ivypanda.com/essays/evolution-different-types-of-selection/

Work Cited

"Evolution: Different Types of Selection." IvyPanda, 5 Nov. 2021, ivypanda.com/essays/evolution-different-types-of-selection/.

References

IvyPanda. (2021) 'Evolution: Different Types of Selection'. 5 November.

References

IvyPanda. 2021. "Evolution: Different Types of Selection." November 5, 2021. https://ivypanda.com/essays/evolution-different-types-of-selection/.

1. IvyPanda. "Evolution: Different Types of Selection." November 5, 2021. https://ivypanda.com/essays/evolution-different-types-of-selection/.


Bibliography


IvyPanda. "Evolution: Different Types of Selection." November 5, 2021. https://ivypanda.com/essays/evolution-different-types-of-selection/.

If, for any reason, you believe that this content should not be published on our website, please request its removal.
Updated:
This academic paper example has been carefully picked, checked and refined by our editorial team.
No AI was involved: only quilified experts contributed.
You are free to use it for the following purposes:
  • To find inspiration for your paper and overcome writer’s block
  • As a source of information (ensure proper referencing)
  • As a template for you assignment
Privacy Settings

IvyPanda uses cookies and similar technologies to enhance your experience, enabling functionalities such as:

  • Basic site functions
  • Ensuring secure, safe transactions
  • Secure account login
  • Remembering account, browser, and regional preferences
  • Remembering privacy and security settings
  • Analyzing site traffic and usage
  • Personalized search, content, and recommendations
  • Displaying relevant, targeted ads on and off IvyPanda

Please refer to IvyPanda's Cookies Policy and Privacy Policy for detailed information.

Required Cookies & Technologies
Always active

Certain technologies we use are essential for critical functions such as security and site integrity, account authentication, security and privacy preferences, internal site usage and maintenance data, and ensuring the site operates correctly for browsing and transactions.

Site Customization

Cookies and similar technologies are used to enhance your experience by:

  • Remembering general and regional preferences
  • Personalizing content, search, recommendations, and offers

Some functions, such as personalized recommendations, account preferences, or localization, may not work correctly without these technologies. For more details, please refer to IvyPanda's Cookies Policy.

Personalized Advertising

To enable personalized advertising (such as interest-based ads), we may share your data with our marketing and advertising partners using cookies and other technologies. These partners may have their own information collected about you. Turning off the personalized advertising setting won't stop you from seeing IvyPanda ads, but it may make the ads you see less relevant or more repetitive.

Personalized advertising may be considered a "sale" or "sharing" of the information under California and other state privacy laws, and you may have the right to opt out. Turning off personalized advertising allows you to exercise your right to opt out. Learn more in IvyPanda's Cookies Policy and Privacy Policy.

1 / 1