Lesson summary for:
The Making of the Fittest: The Birth and Death of Genes
This 13-minute film describes how scientists have pieced together the evolutionary history of the Antarctic icefish by studying its genome – an excellent case study for genetic evolution as both the gain and loss of genes have led to key adaptations.
Howard Hughes Medical Institute
HHMI provides a variety of teacher resources to accompany this video: an in-depth film guide, student quiz, two demonstrations and three student lessons
- There is a fit between organisms and their environments, though not always a perfect fit.
- Evolution is often defined as a change in allele frequencies within a population.
- Evolution results from natural selection acting upon genetic variation within a population.
- Evolution results from mutations.
- Natural selection and genetic drift act on the variation that exists in a population.
- Mutation is a random process.
- Organisms cannot intentionally produce adaptive mutations in response to environmental influences.
- Evolution does not consist of progress in any particular direction.
- A hallmark of science is exposing ideas to testing.
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