evolutionary explanations AO1
- Created by: alexspringett123
- Created on: 26-01-17 14:06
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- evolutionary explanations (Darwin) A01
- Sexual selection
- attributes or behaviors that increase reproductive success to future generations
- Anisogamy
- Females have a limited amount of egg production and therefore are discriminatory in their choice of partner.
- Inter-sexual selection
- The strategies that an individual uses to select their male of female partner (between the sexes)
- Genes that make someone more attractive are more likely to attract a partner and pass on the gene
- An example is if women prefer tall men as they can protect and support them, there will be an increase of tall men in the population
- An individual possessing the characteristics are more likely to mate as humans are programmed to attend to such characteristics
- Intra-sexual selection
- males compete with one another to achieve reproductive success (male competition)
- The winner gets to reproduce with the female and therefore pass on his characteristics through his offspring
- The winners are most likely to be those with greater physique and strength
- Key characteristics include: muscularity, deep voice, facial and body hair
- Short and long term mate preference
- Being choosy means that at least half of the genetic quality of an offspring will be determined by the partner chosen.
- Long term mating preferences
- this is where males and females both invest heavily in any offspring. this means that both sexes have to be choosey.
- Females seek a male that can provide for and protect their offspring
- Males seek a female that shows signals of fertility in order to achieve reproductive success
- poor long term mate choice could be disastrous as both sexes would have invested valuable recourses
- this is where males and females both invest heavily in any offspring. this means that both sexes have to be choosey.
- Short term mating preferences
- over the years males have evolved a greater desire for casual sex and sex early in on the relationship
- Females have not evolved the same way as men as they can still only reproduce a limited number of times
- Sexual selection
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