What is a cladogram? It is a diagram that depicts evolutionary relationships among groups. It is based on PHYLOGENY, which is the study of evolutionary relationships. Sometimes a cladogram is called a phylogenetic tree (though technically, there are minor differences between the two). In the past, biologists would group organisms based solely on their physical appearance. Today, with the advances in genetics and biochemistry, biologists can look more closely at individuals to discover their pattern of evolution, and group them accordingly - this strategy is called EVOLUTIONARY CLASSIFICATION CLADISTICS is form of analysis that looks at features of organisms that are considered "innovations", or newer features that serve some kind of purpose. (Think about what the word "innovation" means in regular language.) These characteristics appear in later organisms but not earlier ones and are called DERIVED CHARACTERS. PART I - Analyze the Cladogram Looking at the pictures, can you describe how this form of communication has changed over time?
Questions for Video
Please watch the video and answer the following questions for homework. The questions should be completed using either Word Document or Google Docs and Emailed to [email protected] no later than Friday January 29. In case of any questions please contact me through Edmodo. Today we will answer the following questions: What is meiosis? What was Mendel's greatest contribution to the filed of science? What is heredity? What was Mendel using as part of his investigation? What are alleles? Chapter 6.3 Mendel and Heredity Pres Chapter 6.3 PN Chapter 6.4 Traits, Genes, and Alleles Pres Chapter 6.4 PN |