Name Date Period Chapter 16 Evolution of Population s Take notes here Summary – one summary at the end Questions “Cornell Style”

 A Mutation is any change in DNA  A mutation can change the phenotype and fitness of an organism  Fitness – an organisms ability to survive and reproduce. Genetic Variation

Mutations  Sex cell mutation – occur in sex cells (gametes), don’t affect organism but can be passed on.  Somatic mutation – occur in body cells, skin cancer and leukemia, not passed on.  Lethal mutation – cause death usually before birth

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Summary of Mutations

Chromosome Mutations What type of mutation is shown?

Chromosome Mutations What type of mutation is shown?

1. Speciation – when similar organisms become separated and will no longer interbreed.  Species -- The ability to reproduce and have viable offspring.

1. Behavioral Isolation  Different courtship rituals or other types of behaviors. Isolation

2. Geographic Isolation  When a deep canyon or river splits a population stopping gene flow.

3. Temporal Isolation  Two or more species reproduce at different times.

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Mule Male donkey and female horse

Liger Male lion & female tiger. Can weigh up to 800 lbs.

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