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Sympatry

Speciation

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The last ice age produced many different species mainly because of vicariance events; the glaciers physically separated populations from each other. Sympatry: populations that live close enough to interbreed Gene flow prevents speciation in sympatric populations A mating between a tetraploid individual and a diploid individual produces: triploid individuals: which likely produce nonviable gametes with an uneven number of chromosomes All polyploid individuals contain more than two haploid sets of chromosomes
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BIO152 Lecture 12 The Origin of Species

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Lecture 16-17 BIO152 The Origin of Species L16 flightless : can?t fly but its a really good swimmer Biological species concept states a species is group whose members have potential to interbreed in nature and produce viable, fertile offspring mule is viable but not fertile reproductive isolation-barriers that prevent two species from breeding reproductive isolation is classified if it happens before or after fertilization sperm of one species may not be able to fertilize the other- gameric isolation they may be viable in one generation but not the others- hybrid breakdown post zygotic barriers have to do with hybrids beluga seal intrasextual- inflates balloon to warn of males if they approach and use his balloon again to attract female (intersextual)
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