Classification
- Created by: emma
- Created on: 07-04-14 21:43
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- Classification
- System
- Organisms placed into taxa groups and they can only belong to one group at each level
- Kingdom, phylum, class, order, family, genus, species
- Creates hierarchial system
- Groups within groups with no overlapping
- Organisms placed into taxa groups and they can only belong to one group at each level
- Species
- A group of similar organisms able to reproduce and produce fertile offspring
- Phylogenetics
- Study of patterns of evolutionary history/ relationships
- Organisms which shared the same common ancestor more recently are more closely related
- DNA hybridation
- DNA from two species you want to compare
- Heat to separate strands (break H bonds)
- Add radioactive label to DNA strand from on species
- Mix DNA and cool producing DNA hybrids
- Increase temp in small increments
- Measure amount of hybrid DNA which is still double stranded
- The more similar the DNA sequences the more hydrogen bonds formed meaning more heat is required to break them apart
- Increase temp in small increments
- Mix DNA and cool producing DNA hybrids
- Add radioactive label to DNA strand from on species
- Heat to separate strands (break H bonds)
- DNA from two species you want to compare
- Immunological comparison
- Inject protein into animal
- Obtain antibodies
- Add protein from other species
- Amount of precipitate indicates relationship
- Add protein from other species
- Obtain antibodies
- Inject protein into animal
- Courtship behaviour
- Attracts same species
- Attracts opposite sex
- Indication of sexual maturity
- Stimulates release of gamets
- Form a pair bond
- Plants
- Based on DNA sequences of 3 genes found in all plants
- Phylogenetic tree showed how species have evolved into natural groups
- Using homologus species
- Phylogenetic tree showed how species have evolved into natural groups
- Based on DNA sequences of 3 genes found in all plants
- System
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