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Speciation and the Apple Maggot Fly - Hannah Kim AP Biology...

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Hannah Kim AP Biology February 17, 2010 Speciation and the Apple Maggot Fly 1. What species concept should be used in this case? Interbreed and reproduce healthy, fertile offspring. The two species follow sympatric speciation, where two closely related organisms overlap in terms of geographical range. Both the flies inhabit the hawthorn trees, but the apple maggot flies have an advantage because apples grow faster. 2. Are apple maggot flies distinct as a species from hawthorn maggot flies? Yes. The apple maggot flies is originally bred in the large fruits of hawthorn trees— ithey have different genomes from that of the hawthorn maggot flies. Fidelity to fruti type acts as a strong barrier to gene flow between the two types of flies. As a result, the two do not mate (and the few that do produce weak offsprings). 3. Propose a biologically reasonable scenario that explains how apple maggot flies evolved. Apple maggot flies were hawthorn flies. However, over several hundreds of years, the hawthorn trees were less abundant. Hence, a group of maggot flies discovered that apples are
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