1: Systematics Flashcards
Define Systematics
Study of biology diversity, the relationships between organisms (trees) & their evolutionary history
Cladogram
Diagram that shows the relationships between organisms
Phylogram
Branching diagram showing inferred evolutionary relationships, (length of branches represent genetic distance)
Hierarchical Categories
Kingdom Phylum/Division Class Order Family Genus Species
Suffix
1) Kingdom
2) Phylum
3) Class
4) Order
5) Family
1) Plantae
2) …phyta
3) …sida
4) …ales
5) …ceae
A Monophyletic Group
a terminal clade which consists of a group
of species with a single common ancestor and all its descendants;
(all species in a genus should have a common ancestor),
(all genera in an order should have a common ancestor)
A Paraphyletic Group
has a common ancestor but not all the
descendants
A Polyphyletic Group
has two or more ancestors
A Homologous Group
has a common origin, but not a necessarily a
common function
(Monophyletic group)
An Analogous Group
has a common function, but not a common origin
result of convergent evolution
An Analogous Group
has a common function, but not a common origin
result of convergent evolution
Convergent evolution
process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities.
Polymerase Chain Reaction (PCR)
3 Steps at 30 - 40 cycles
1) Denaturation (1 min at 94* C) 2) Annealing (45 seconds at 54* C 3) Extension (2 mins at 72* C