Term
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Definition
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Term
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Definition
-Small strand of DNA
-Codes for a particular protien or trait. |
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Term
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Definition
-Long strand of DNA
-Has many genes on it |
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Definition
-Smallest basic unit of DNA
-Contains sugar, phosphate and nitrogen |
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Term
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Definition
| -Theory that organisms will change over time to look different from their ancestors. |
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Term
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Definition
| -Leads to variation within a species resulting in mammals, 1/2 of genetic information from each parent. |
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Definition
| -A permanent change in DNA and is the main source of new allels. |
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Definition
| -The preserved remains of organisms that lived a long time ago. |
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Definition
| -A collection of all the uknown fossils. |
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Definition
| -Nature will determine which organisms live and which will die. |
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Definition
| -Those individuals with a genetic trait that gives them an advantage over others of the same species. |
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Definition
-The organisms with the advantage had adapted to its surroundings.
-This increases chances for survival and reproduction. |
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Definition
| -When one species evelves into one or more other species. |
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Definition
| -A group of organisms that look alike and can interbreed under natural conditions to produce fertile offspring. |
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Definition
| -The formation of a new species. |
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Definition
| -Alternative form of a gene. |
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Definition
| -Genotype in which both genes of a pair are different. |
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Term
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Definition
-Some organisms have more oppertunity to mate than others.
-Produce offspring more than others (more copies of there gene). |
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Term
| Allelic/Relative Frequency |
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Definition
| -How often an allele occurs in a population. |
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Term
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Definition
| -All of the genes that occur within a specififc population. |
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Term
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Definition
| -Individuals of different populations immigrate or emigrate between populations of the same species. |
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Term
| Recombination (Crossing Over) |
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Definition
| -Parts of chromosomes switch parts. |
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Term
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Definition
| -Evolution towards the same type of adaptation among different groups of organisms. |
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Term
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Definition
| -Have the same function but different structures. |
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Definition
| -Evolution which led to different structures developing from original body plans. |
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Definition
-Are produced by Divergent Evolution.
-Has a different function but same structure due to a common ancestor. |
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Definition
| -Remains of a structure that had functioned in an ancestor, but no longer does in the evolved organism. |
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Definition
| -Where an enviroment favours an average for a particular trait. |
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Definition
-Where an enviroment favours one extreme.
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Definition
| -Where the enviroment favours both extremes. (leads to speciation) |
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Term
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Definition
| -Genotype in which both genes of a pair are identical. |
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