Biology Unit 4
Terms
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- Darwin
- Credited w/Evolution Theory, "On the Origen of Species"
- Genetic Drift
- Change in gene pool of small pop. due to chance
- Gene Pool
- The sum total of all alleles in a population
- Fossil Record
- Sequence of organisms: prokaryotes-eukaryotes
- Molecular Biology
- Science dealing w/DNA and protein synthesis of living orgs.
- Vestigial Structure
- Body structure that has no function in present day
- Comparative Anatomy
- Study of anatomical features of animals of different species
- Non-random Mating
- Inbreeding
- Bottleneck Effect
- Drastic reduction in pop.; descendants may not represent originals
- Mutation
- Change in DNA that affects genetic info
- Homologous Structure
- Structure w/common evolutionary history - still useful today
- Biogeography
- Geographic distance of species
- Natural Selection
- Mechanism for descent w/mod.; survival of the fittest
- Gene Flow
- Movement of alleles into or out of a population
- Descent w/modification
- Today's organisms came from ancestrial species
- Evolution
- Theory that genetic composition changes over time
- Founder Effect
- When a small pop. breaks away to form colony & new species develops
- Comparative Embryology
- Study of development of organisms - ie, gill slits in all vert.
- Malthus
- Originator of Natural Selection, British economist
- Macroevolution
- Major genetic changes seen in fossil records
- Microevolution
- Small specific genetic changes w/in gene pool - pop. adaptation