Class Notes (839,574)
Canada (511,407)
York University (35,597)
Biology (2,273)
BIOL 1000 (397)


2 Pages

Course Code
BIOL 1000
Tamara Kelly

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Fri,nov 18 , 10 Inportance of ring species Interbreeding - adjacent species can interbreed - different features of ring species. - They can co-exist in the same area but they don’t interbreed( refer to image on importance of ring species.) - Species next to one another can interbreed but they can’t interbreed with opposite - They can reproduce hybrids but they don’t well because they are mediums( no camflauge ( blend in or mimicking ) - Hydrids die sooner and can’t find mates. - Can show us wat happened during speciation and how species have evolved. Themes of speciation 1. Anagensis- hard to identify, happens over a long period time= evolve into new species 2. cladogensis – divergence of one species into 2 or more.(branching) – more common form of speciation modes of speciation 1. Allopatric = geographical speciation (natural selection, genetic drift and mutation) are the microevolutionary mechanisms tht can lead to speciation. (midterm question) === clicker question – refer to PP . - matuation is acted on by NS and genetic D. - 2 step process= pops become geographically separated - evolutionary mechanisms tht work in both the pops..but will act differently on both the gens - vicariance: separation by geography( physical barrier) - differences in ecolutionary differences mechanisms result in accumlation of genetic differences tht reproductively isolate the pops. - Gene flow is not a opera
More Less
Unlock Document

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

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


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.