How do we know if two animals are the same species?

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Presentation transcript:

How do we know if two animals are the same species? Date: 3/29/17 Topic: Speciation Page # ___ Must wear uniforms/IDs! 3/29/17 EBHS Admit Slip How do we know if two animals are the same species?

(Use your homework notes!) What defines a species? How do you know if two animals are different species or the same species? (Use your homework notes!)

Definition of a Species* Two animals are the same species if they can mate and produce fertile offspring* This means their BABIES must be have to HAVE BABIES* What’s it called when two different species mate and produce an offspring?

Female lion + male tiger? Hybrid* klkk When two different species produce an offspring. The offspring is sterile (cannot have children).* Female lion + male tiger? Liger

Other hybrids? Why might humans purposely breed hybrids? To produce best qualities of both species! Ex. Horse & Donkey… Mule

How do organisms become different species? *Speciation = The slow process of one species turning into two different species Turn into 2 different species = evolution Mechanisms of Evolution…

Mechanisms of Evolution Mutation Gene Flow Genetic Drift Bottleneck Effect Founder Effect Natural Selection Geographic Isolation Start as 1 species  become 2 different species Brief Review (Will be part of ppt!)

Mutation

Gene Flow

Genetic Drift

Bottleneck Effect

Founder Effect

Natural Selection

Geographic Isolation

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