Molecular Clocks: Proteins That Evolve at Different Rates

PBS Learning Media
Contributed By
PBS Learning Media
Resource Type
Classroom Material
Keywords
proteins evolution natural selection species horses human Molecular clock Molecules structure Amino acid Genes DNA Mutation Random variation common ancestry adaptation evidence Divergence Speciation Histone Hemoglobin Cytochrome Fibrinopeptide
Subjects
Science
Grade Levels
Grade 9 Grade 10 Grade 11 Grade 12
Related Resources

Molecular Clocks: Proteins That Evolve at Different Rates

Compare four different proteins from humans and horses, and learn the reasons each protein evolves at its own characteristic rate with this article and illustrations from The Human Evolution Coloring Book by Adrienne Zihlman. Each protein is useful for measuring evolutionary change over a different time scale.
Publisher
PBS Learning Media

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