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| Gregor Mendel 3 hypothesis |
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Definition
| 1.alternate forms of 1 gene determine heritable characteristics 2.dominant & recessive alleles 3.for each heritable characteristic, there must be 2 alleles |
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Definition
| 1 gene influences several phenotypes; usually detected by mutation a.gene affects 2 traits ex. siamese cats b.gene affects multiple traits ex. Marfan syndrome |
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Definition
| 2 alleles on 1 gene COMPLETELY stop expression of 2 other/diff alleles a.genotype epistasis: 2 alleles on 1 gene code for protein, protein stops transcription of 2 other/diff alleles b.phenotype epistasis: labrador fur color Black+brown=yellow epistatic hybrid cross= 9:4:3 |
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Definition
| *2 "identical" allese are both dominant *pheno of F1 is intermediate of P, neither allele is completely dominant over other allele *ex. snapdragons red + white= pink 1:2:1 |
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Definition
| *2 non "identical" alleles code for 1 pheno *blood type |
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Term
| Theory: divinely inspired |
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Definition
| each species created w/ specific function/purpose |
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| divinely inspired natural disaster, @ creation every species on Earth existed catastrophe- destroy species- some species repopulate- reoccurs |
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| Lamark's theory 3 Principals |
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Definition
| inheritance of acquired characteristics; built on environment changes 1.use or disuse ex. giraffe necks 2.acquired characteristics passed on - organisms pass modifications to offspring 3.organisms have drive to become more complex biological drive (darwin rejected) |
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Definition
| *natural selection: variation in traits determine ability of individual to secure resources by the enivornment |
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Definition
| allele frequency shifts consistently in 1 direction |
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Definition
| intermediate pheno not favored, allele freq. shifts to both extremes |
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Definition
| opposite of disruptive selection, intermediate pheno is favored |
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Term
| Hardy-Weinberg Equilibrium |
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Definition
| theory: allele freq in a pop is constant if: 1.Random mating 2.Large pop 3.No mutations 4.No natural selection 5.Isolated pop |
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