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Refer to the table showing the relationship between prezygotic reproductive isolation and genetic distance for both allopatric and sympatric pairs. Drosophila species that have been crossed with each other allow evolutionary biologists to make general inferences about their evolution.Species pairs that are sympatric accumulate more prezygotic reproductive isolation at a faster rate than those that are allopatric.There is no such effect on postzygotic reproductive isolation: sympatric and allopatric pairs accumulate postzygotic isolation at the same rate.What is the likely explanation for the patterns observed?
Identical Twins
Twins that originate from a single fertilized egg that splits and develops into two genetically identical individuals.
Cannon-Bard Theory
A theory of emotion that proposes emotions and bodily responses occur simultaneously rather than one causing the other.
James-Lange Theory
An idea that proposes emotions are the outcome of bodily reactions triggered by events.
Spillover Effect
The impact that seemingly unrelated events in one part of a person's life can have on other parts of their life.
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