📚

All Subjects

 > 

🧬 

AP Bio

 > 

🦍

Unit 7

7.9 Phylogeny

1 min readmay 31, 2020

lani

Lani Himegarner


AP Biology 🧬

Bookmarked 7.8k • 331 resources
See Units

Phylogenetic Trees

Phylogenetic trees offer a visual representation of evolutionary relationships, and can even offer a timeline of evolution by showing the amount of change over time. These diagrams can also show traits that have been gained or lost by species over time. By doing this, it not only shows evolutionary relationships, but how multiple lineages are linked to one another as well, as a shared, evolved characteristic usually indicates a common ancestry.

Speciation

Phylogenetic trees, also known as cladograms, show speciation, and the nodes represent the most recent common ancestor. The “out-group” of the cladogram represents the lineage or species that is the least closely related to the rest of the organisms shown.

Cladograms

The nodes, or the points in which two species diverge, help point out the most recent common ancestor, or perhaps a trait that was shared, gained, or lost. These diagrams are constructed from data such as morphological similarities (shared traits) and DNA and/or protein sequence similarities. That being said, while cladograms are great visuals of evolution and different relationships, oftentimes molecular data can provide more accurate an detailed data than just the morphological traits. Nevertheless, hypotheses are continuously proven or revised as these diagrams are updated.
https://firebasestorage.googleapis.com/v0/b/fiveable-92889.appspot.com/o/images%2FScreen%20Shot%202020-04-04%20at%206.21.10%20PM.png?alt=media&token=42476f58-fda7-43d6-91a6-2682bf9018ab

Image courtesy of WikiMedia Commons.

Watch AP Bio live streams here.

Resources:

Was this guide helpful?

Join us on Discord
Thousands of students are studying with us for the AP Biology exam.
join now
Hours Logo
Studying with Hours = the ultimate focus mode
Start a free study session
🔍 Are you ready for college apps?
Take this quiz and find out!
Start Quiz
Browse Study Guides By Unit
📆Big Reviews: Finals & Exam Prep
✍️Free Response Questions (FRQ)
👏General Review
🧐Multiple Choice Questions (MCQ)
🧪Unit 1: Chemistry of Life
🧬Unit 2: Cell Structure and Function
🔋Unit 3: Cellular Energetics
🦠Unit 4: Cell Communication and Cell Cycle
👪Unit 5: Heredity
👻Unit 6: Gene Expression and Regulation
🦍Unit 7: Natural Selection
🌲Unit 8: Ecology
FREE AP bio Survival Pack + Cram Chart PDF
Sign up now for instant access to 2 amazing downloads to help you get a 5
Join us on Discord
Thousands of students are studying with us for the AP Biology exam.
join now
💪🏽 Are you ready for the AP Bio exam?
Take this quiz for a progress check on what you’ve learned this year and get a personalized study plan to grab that 5!
START QUIZ