Sexual selection

Farkaš, Marina (2009) Sexual selection. Bachelor's thesis, Faculty of Science > Department of Biology.

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Abstract

Sexual selection is a selection of characteristics that are associated with reproductive success and competition for the mate. Those characteristics increase chances of an individual for successful reproduction and chances of passing their genes to the next generation. The origin of sexual selection is associated with evolution of anisogamous organism, two sexes that produced different gametes and had different reproductive success. Sexual selection mostly operates on males because they have bigger reproductive success, create larger offspring but invest less in it and because of that, they are called less limited sex. This type of selection works thru two mechanism: male to male combat and female choice. Traits or characteristics selected by male to male combat are referred to as "weapons", and traits selected by female choice are called "ornaments". Sometimes, there is a third mechanism called sexual conflict. The consequences of sexual selection are difference between males and females of a species that are called sexual dimorphisms. Besides the animals, sexual selection sometimes operates on plants, primarly on hermaphroditic flowering plants. By sexual selection they create flowers that are more beautiful, noticeble and more attractive to pollinators, which increses their reproductive success.

Item Type: Thesis (Bachelor's thesis)
Supervisor: Kalafatić, Mirjana
Date: 2009
Number of Pages: 17
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 15 Dec 2014 11:48
Last Modified: 15 Dec 2014 11:48
URI: http://digre.pmf.unizg.hr/id/eprint/3522

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