{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}


Lecture_4_Phylogenetics - Phylogenies Phylogenetics...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
6/15/2011 1 Phylogenetics LS1: Summer Session A June 27, 2011 Phylogenies Phylogeny is the evolutionary history of relationships between lineages of organisms Phylogenetic trees graphically depict these relationships Speciation and lineage formation Reproductive isolation between lineages leads to speciation The divergence of lineages can be reflected in the relative similarities and differences of the organisms in the lineage Lineage formation How to read a phylogenetic tree A group or organisms or species is referred to as a taxon A taxon that includes all of the evolutionary descendents of a single common ancestor is called a clade Two clades that are most closely related are referred to as sister clades All of life is evolutionarily related
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6/15/2011 2 Linneaus ’ system of taxonomy Swedish naturalist Carolus Linnaeus devised a classification system based on morphological similarities Binomial nomenclature Genus species Carolus Linnaeus (1707-1778) Binomial nomenclature Genus species Avoids confusion among common names Formalized process of naming governed by international naming commissions Fer-de-Lance Terciopelo Barba amarilla Cola blanca Bothrops asper The hierarchical organization of life Kingdom Phylum Class Order Family Genus Species
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 6

Lecture_4_Phylogenetics - Phylogenies Phylogenetics...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online