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Synapomorphy

Rawle Phylogeny III

Subject: 
Biology
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Phylogenetics
Synapomorphy
Phylogenetic tree

This week?s Bio seminar Friday, Jan. 23, at 12:00 in DV2082 Sapna Sharma, York University A landscape perspective: The effects of climate change on aquatic ecosystems 1 Lecture 6: Phylogeny III Differentiating ancestral and derived character states Constructing character tables Drawing phylogenetic trees One more misconception 2 Do you support or oppose the following government policies? 3 http://www.washingtonpost.com/news/volokh-conspiracy/wp/2015/01/17/over-80-percent-of-americans-support-mandatory-labels-on-foods-containing-dna/ It?s all relative Are feathers a derived or an ancestral character when you compare? songbirds with ducks birds with reptilian ancestors A. Derived B. Ancestral 4 These terms are relative We want to determine the

Rawle Phylogeny II

Subject: 
Biology
Rating: 
0
No votes yet
Tags: 
Phylogenetics
Evolutionary biology
Synapomorphy
Biology
Common descent
Symplesiomorphy
Species
Homology
cladogram
Cladistics

This week?s Bio seminar Friday, Jan. 23, at 12:00 in DV2082 Sapna Sharma, York University A landscape perspective: The effects of climate change on aquatic ecosystems 1 Lecture 5: Phylogeny II Avoid common mistakes Define homologous and analogous characters Distinguish derived and ancestral characters 2 How did you make your decision? Who is more closely related to salamanders? A. Lungfish B. Humans 3 Trees are hypotheses 4 Jetz et al. 2012. Nature 491: 444-448 But how do we construct trees? 5 Similar species are likely related Taxa that are more similar are likely more closely related than less similar species Morphology DNA sequence Behaviour ? 6 Similarity due to shared ancestry produces homology 7
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