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11 Cards in this Set

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How does the principle of parsimony apply to phylogeny reconstruction?
The principle implies that the phylogenetic tree most likely to be correct is the one that requires fewest evolutionary changes making phylogeny reconstrution
Define the following terms:
Synapomorphy
A shared, derived character that can be used to infer evolutionary relationships
Ancestral
Original state from which they were born
Monophyletic
ancestor and all decendents
Paraphyletic
ancestor & some of its decendents
Polyphyletic
group that do not share common ancestory
Define primitive
(tells us nothing)
Define derived
(tells us everything)
what provides the only real evidence of a relationship?
a-synapomorphy
b- primitive
c-ancesteral
d-derived
A
How do you establish if a character is derived or ancesteral?
Derived characters, the outgroup doesnt have it. primitive characters, the outgroup does have it. (derived is part of ingroup)
Which of the following term is preferred and which one is most likely the reality of any group?
a-monophyletic
b-paraphyletic
c-polyphyletic
A;B