Phylogenetics Flashcards
1
Q
What is a phylogeny
A
a genetic gamily tree,
older at the bottom, newest at the top
they are all hypothesises about the relationship between species
2
Q
What is clade
A
a group of organisms that share a common ancestor, both living and extinct
clades can be nested in one another
3
Q
What dos a division and forming of 2 branches mean in a phylogeny tree mean
A
a speciation event occured
4
Q
what do biologists look for when making phylogeny
A
shared derived characters - traits that set members of a clade apart from other clades
ex - having 4 limbs - reptiles, mammals, birds all historically had 4 limbs
5
Q
What heritable traits do biologists across organisms to make a phylogeny
A
Morphology
genetic sequence
behavioral traits
