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BIO Sept9Lec

BIO Sept9Lec - Transcribed BioG 1109 lecture notes(ppt...

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Transcribed BioG 1109 lecture notes (ppt) Routine Class Matters ~ Reading assignments for Today: Chp 16 intro essay through section 16.16 (don’t emphasize 16.1-16.6); Reading for Thur 16.17 – end chapter & Ch 17 intro essay through 17.14). i<clicker questions…office hours this week… ALL questions about enrollment and lab scheduling Please contact Kathy (kma11). PLEASE REGISTER YOUR i<Clickers ` using the NEW CIT protocol posted on BLACKBOARD [we apologize, but CIT just informed everyone of the change]. (ppt SERIES) The first few ppt slides are REVIEWS important points from last Thur. What do family trees and cladograms have in common. The “Homer Simpson slide” demonstrates how we can construct a phylogenetic tree by placing ancestors at the bottom and more recent developments at the top. This example shows how humans & hamsters are more closely related to each other than jellies due to the presence of a backbone in humans and hamsters. o What predictions would you make? E.g. Many similarities o What are the two basal branches and nodes? Node = animalia Tree of life ~ nested sets of similarities What is the difference between taxa? This is a very important concept for you to know! [See your lab manual to help you with this too]. Why is the Class Reptilia considered a paraphyletic group? Know the key rules of Phylogenetic Classification (summarized on slide 4). o Ideally, every grouping is monophyletic o Named groups are associated with the origin of characteristics that diagnose them o Major evolutionary transitions are represented, like the origin of four legs, fur and lactation, etc. o We can reconstruct the tree of life from the classification, and vice versa ! Review slide recapping the Evolution, Unity & Diversity of life (Figure 1.4A) ~ we now have the ability to sequence the genetic code 1
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Transcribed BioG 1109 lecture notes thus delving into the evolutionary history of organisms. At the molecular level the similarity that unites phylogenetic groups in DNA. The time will come when we’ll compare organisms based on their DNA sequence. Fig 15.9C represents the widely accepted phylogenetic relationships
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BIO Sept9Lec - Transcribed BioG 1109 lecture notes(ppt...

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