New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

week 1

by: Mary-elizabeth Notetaker

week 1 Bio 409

Mary-elizabeth Notetaker
U of L

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

week 1
Evolutionary Biology
Jeffery Bara
Class Notes
Biology, evolutionarybiology, bio409
25 ?




Popular in Evolutionary Biology

Popular in Biology

This 1 page Class Notes was uploaded by Mary-elizabeth Notetaker on Sunday August 28, 2016. The Class Notes belongs to Bio 409 at University of Louisville taught by Jeffery Bara in Fall 2016. Since its upload, it has received 17 views. For similar materials see Evolutionary Biology in Biology at University of Louisville.


Reviews for week 1


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 08/28/16
Ch 2 • Views on history of life: ⿞Special creation ⿞Darwinian theory of descent w modification ‣ Microevolution- change through time • Vestigial stxs/genes ‣ Speciation • Species- interbreeding groups/pops ‣ Macro evolution-fossils • Transitional forms- same species w diff forms..Have traits typical of distinct organism groups even tho same species ‣ Common ancestry • Homology- get nested patterns of traits to predict when species/traits arose • Molecular homology- shared flaws provide further evidence ⿞Pseudogenes- broken genes and accumulate flaws ‣ Comparing to mother gene shows how old it is ‣ Life on earth is old CH 3 • relationship btwn pattern and process • Nat selection- process in which events act on individuals but affect pops ⿞only process that leads to adaptation ⿞Explains species divergence and life diversity ⿞Darwin's dangerous idea- explains apparent design of the living world w/out recourse to supernatural ⿞Darwin's postulates- claims about nature of pops of orgs..must have all 4 • tested w direct evidence • Identify logical consequence • Can test whether logical consequence is observed ‣ Phenotype variation (mutation) ‣ Heritable variation ‣ Differential survival ‣ Differential success is attributable to certain alleles/allele combos ⿞Darwinian fitness- relative measure of indivs ability to survive and reproduce • indivs do not change • Pop changes as result of cold arithmetic ‣ fitness of biological entity- avg over capitals rate of inc in numbers • components relate to prob of survival to reproductive age • Avg number offspring produced from females(eggs/seeds) or males(sexual selection) • Prob and avg so fitness is defined for indivs w particular genotype ⿞Nature of Nat selection ‣ acts on standing variation to inc fitness in current environment,may not help in diff place or in future ‣ Acts on existing traits but new ones can emerge • exaptation- trait that is used in novel way • Directional selection- rare/extreme phenotype favored,causing allele freq to shift over time in direction of that phenotype ⿞selects for one extreme,moves pop in one direction • Disruptive selection- individuals w extreme/rare values of traits have highest fitness ⿞increases variation ⿞Moves towards both extremes,most common is selected against • Stabilizing selection- purifying selection...Decrease in variation around mean w/out changing mean • Frequency dependent selection- fitness of genotype dependent upon freq ⿞ex) mimics ‣ when small amt of mimics has high fitness BC higher prob predators ate real thing and will avoid mimics


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Kyle Maynard Purdue

"When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the I made $280 on my first study guide!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.