Chapter 25

Chapter 25 - phylogram length of a branch indicates the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 152 Notes Chapter 25: Phylogeny and Systematics molecular systematics – compares DNA, RNA, and other molecules to infer evolutionary relationships Concept 25.1 homoplasies – an analogous structure (e.g. bat’s wing/bird’s wing) Concept 25.2 Linnaeus – came up with the binomial binomial – genus followed by a specific epithet (e.g. Panthera pardus) Concept 25.3 cladogram – diagram implying common ancestry (not evolution) clade – group of species that include an ancestral species and all its descendants cladistics – analysis of how to make clades monophyletic – (a true clade), a common ancestor and all its descendents paraphyletic – a common ancestor and some but not all its descendents polyphyletic – grouping of several species that lack a common ancestor shared primitive character – a character that is shared beyond the taxon being defined shared derived character – evolutionary novelty unique to a particular clade
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: phylogram length of a branch indicates the number of changes that have taking place in a DNA sequence ultrametric tree all the branches are of equal length rRNA codes slowly mtDNA codes quickly homologous genes duplications lead to shared genes orthologous gene refers to a homologous gene that is passed in a straight line but have ended up in different gene pools because of speciation paralogous gene result from gene duplications Concept 25.5 neutral theory much evolutionary change in genes and proteins has no effect on fitness and therefore Darwinian selection domains bacteria, archaea, eukarya horizontal gene transfer occurred often in the early history of life between the domains, genes are transferred through means of transposable elements and fusion...
View Full Document

Page1 / 2

Chapter 25 - phylogram length of a branch indicates the...

This preview shows document pages 1 - 2. Sign up to view the full document.

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