Class Notes (884,988)
US (343,718)
UMASS-Amherst (4,009)
Lecture 11

BIOLOGY 280 Lecture 11: Sexual Selection

2 Pages

Course Code
Bruce Byers

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
find more resources at Lecture 1: Sexual Selection Monday, October 17, 2016 12:22 PM Sensory bias: 1. Natural selection on sensory system (male and fema )le 2. Results in pre-existing bias in females for male trait that has not arisen (ex. Preference for a certain color or shape, even if ioesn't exist in the male yet) 3. Mutation in male produces rudimentary version of tria t (mutation in males that females are predetermined to prefer) Clucia flowers drop in water that guppies really like to eat. Male guppies ○ have orange spots, and females like bigger and brighter orange spots. Turns out these spots are made from the environment not body functions. § Experiment: if given circles from different colors,they will choose the orange. (sensory bias = attraction to orange) because nutritious food usually is orange § Higher attraction to color orange = females are attract ed to more orange spots Nerophis ophidion: - Males chose slightly larger females most of the tim,e and females with bigger skin folds - Males chose females with fewer spots whether they wr e caused by tattoos or parasites (choosing on the basis of phenotypes) Painted snipe birds: - Females are more brightly
More Less
Unlock Document
Subscribers Only

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
Subscribers Only
You're Reading a Preview

Unlock to view full version

Unlock Document
Subscribers Only

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.