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 4 Notes

by: Chasia Notetaker

Week 4 Notes BIOL 12000

Chasia Notetaker
GPA 3.56

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

These notes cover the week of February 15, 2016.
Fundamentals of Biology II: Ecology and E
Nancy L Jacobson
Class Notes
25 ?




Popular in Fundamentals of Biology II: Ecology and E

Popular in Biology

This 2 page Class Notes was uploaded by Chasia Notetaker on Friday February 19, 2016. The Class Notes belongs to BIOL 12000 at Ithaca College taught by Nancy L Jacobson in Fall 2016. Since its upload, it has received 17 views. For similar materials see Fundamentals of Biology II: Ecology and E in Biology at Ithaca College.


Reviews for Week 4 Notes


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: 02/19/16
Notes for the week of February 15, 2016    Sexual Selection and Kin Selection  ­mates are now the limited resource being competed for  ­often involves the evolution of exaggerated traits  ­may appear to be maladapted to the environment  ­usually found only in males (sexual dimorphism)  ­can evolve in two ways  ­within sex competition  ­intrasexual selection  ­male­male competition  ­exaggerated traits help male to win fight and get females  ­other types of traits can help, ex. female mimicry  ­between sex choice  ­intrasexual selection  ­female choice  ­females can use exaggerated trait as basis for choice  ­if a male can survive with the trait, he must be healthy and have good  genes    Kin Selection is another form of natural selection    Altruistic behavior  ­individuals increase the fitness of others at a cost to themselves  ­extreme case: rather than having their own offspring they help care for another’s offspring  ­defend their communal nests  ­share food resources  ­genes associated with caring for relatives may be favored by selection  ­altruist pass on those alleles indirectly by helping relatives to survive and reproduce  ­those relatives are likely to have copies of those alleles  ­sibling share 50% of their alleles on average  ­ in hymenoptera (honeybees and ants) kin selection is even stronger  ­females are diploid, males are haploid  ­sibling (sisters) share 75% of their alleles  ­share more alleles with sisters than own offspring    Reciprocal altruism  ­still benefiting another at the altruists short­term expense  ­expect favor in return sometime later  ­must be be able to recognize and remember individuals  ­common in primates, including humans    Grandma factor  ­when post reproductive women are present the offspring of their children have a higher  probability of living compared to the offspring not raised with the help of post reproductive  women  ­usually this only applies to the maternal grandmother    13.5​   > Homologies indicate Patterns of Descent that can be shown on an Evolutionary Tree    Evolutionary tree­ history of life as a tree, with multiple branches from a common ancestral trunk  to the descendant species at the tips of the twigs    ­anatomical and molecular homologous structures can be used to determine the branching  sequence of such a tree  ­genetic code is shared by all species because they date to the deep ancestral past  ­characters that evolved more recently are shared only within smaller groups of organisms     


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

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

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!"

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."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

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.