Races and speciation
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RACES AND SPECIATION Click icon to add picture
Transcript of Races and speciation
SPECIES
Sum total of interbreeding races Species are kept separate by
reproductive isolating mechanisms that prevent or
greatly reduce gene exchange between them
Biological species concept
O Two organisms are the same species if they can produce viable offspring
Types of Reproductive
Isolation
O 1. Pre-zygotic-
geographical- temporal-behavioral-mechanical-gametic
2. Post-zygotic-genetic
incompatibility-hybrid
sterility