14-7 - Anthropology chapter 5 terms Macroevolution...

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Anthropology chapter 5 terms Macroevolution – evolution above the species level Speciation – the process of forming new species Isolating mechanism - a factor that separates breeding populations, thereby preventing gene flow, creating divergent subspecies, and ultimately (if maintained) divergent species Cladogenesis – speciation through a branching mechanism whereby an ancestral population gives rise to two or more descendant populations Heterochrony – change in the timing of developmental events that is often responsible for changes in the shape or size of a body part Homeobox gene – a gene responsible for large scale effects on growth and development that are frequently responsible for major reorganization of body plans in organisms Punctuated equilibria – a model of macroevolutionary change that suggests evolution occurs via long periods of stability or stasis punctuated by periods of rapid change. Anagenesis
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14-7 - Anthropology chapter 5 terms Macroevolution...

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