Concept 52 - Concept 51.3 Environment, interacting with an...

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Concept 51.3 Environment, interacting with an animal’s genetic makeup, influences the development of behaviors Environmental factors modify many behaviors. Diet plays an important role in mate selection by Drosophila mojavensis, which mates and  lays its eggs in rotting cactus tissues. Two populations of this fruit fly species use different species of cactus for their eggs. Flies from each population were raised on artificial media in the lab. Females would mate only with males from their own population. The food eaten by male flies as larvae strongly influenced mate selection by female flies.  The proximate cause in the female mate choices was in the exoskeletons of the flies,  assessed by the sense of taste in female flies. When males from the other population were “perfumed” with hydrocarbons extracted  from males of the same population, they were accepted by female flies. The California mouse (Peromyscus californicus) is monogamous. Like male prairie voles, male California mice are highly aggressive to other mice and provide  considerable parental care. Unlike prairie voles, even unmated California mice are aggressive. Researchers placed newborn California mice in the nests of white-footed mice (and vice  versa). White-footed mice are not monogamous and provide little parental care. This cross-fostering changed the behavior of both species.
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Concept 52 - Concept 51.3 Environment, interacting with an...

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