Class Notes (839,552)
Canada (511,390)
Biology (1,309)
BIOL 202 (78)
Lecture

Allopatric Speciation

2 Pages
53 Views

Department
Biology
Course Code
BIOL 202
Professor
Rob Beamish

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
Allopatric Speciation:  Geographically separated sister species reproduce in isolation.  Natural and man-made barriers may arise rapidly.  For example: a population may be divided if a river breaks it's banks and takes a new route, or a new road may separate a population.  Many generations may elapse.  Sister species are now so different - no interbreeding is possible. Sympatric Speciation:  Genetic variation occurring in same geographical location.  Reproductive isolation due to: o Temporal mechanisms o Behavioural mechanisms o Polyploidy  Temporal (time) mechanisms may occur when two very closely related species occupy the same habitat, differing only in the time of year that they complete their life cycles.  Reproductive isolation may develop within the population so that some members produce gametes at distinctly different times of the year from others.  Thus, two distinctive gene pools start to evolve.  Behavioural mechanisms results when members of a population acquire distinctive behaviour routines in their growth and development, courtship or mating process that are not matched by all individuals of the same species.  F
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


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit