A central organizing concept in biology is that life changes and develops through evolution, and that all life-forms known have a common origin.The theory of evolution postulates that all organisms on the Earth, both living and extinct, have descended from a common ancestor or an ancestral gene pool.
CLADISTICS I Take a group of organisms. Let’s use five: a lungfish, a frog, a crocodile, a flamingo, and a human. How to reconstruct their relationships? To use the method known as cladistics, we start by drawing up a list of characters, or features that may or may not be present in each organism.
Post at least one comment question in the reading-discussion channel on Slack and answer/comment on another post. Week 12 (Mar 31, Apr 2) – COVID-19 edition. Computer Lab 6: Hypotheses testing with PAML. I will give a short ZOOM intro and will be around (virtually) to help. Topic 14: Gene trees and species trees . Reading: Maddison (1997).
Answers Note:This lab must be completed by students even if the recommended equipment is not Answers Note: Due to the variety of Android and iOS devices and operating systems, some of the...
In lab, we will examine fossils and identify key structures, as well as discuss assigned readings. A total of 4 lab projects (25 points), 5 fossil descriptions (10 points) and 6 scheduled lab quizzes (20 pts each). Lab schedule: (subject to modification) Sept. 4 No lab 11 Assigned Readings Discussion #1-3 18 Cladistics, Evolution (Project 1)
12:49 Student < Cladistics Lab In this document, you will find a cladogram, representatives of 5 different species, and names of traits. Using your understanding of how cladograms represent the evolutionary relationships among species, your understanding of the fact that descendants of common ancestors share homologous traits, place each species at the cladogram tip where it belongs.