Class Notes (834,258)
Canada (508,445)
BIOL208 (222)
Lecture

BIOL 208 (January 29, 2014) - Mating Systems and Sexual Selections

3 Pages
170 Views
Unlock Document

Department
Biology (Biological Sciences)
Course
BIOL208
Professor
James Cahill
Semester
Winter

Description
BIOL 208 (January 29, 2014) • Mating systems and sexual selections o Sexual reproduction  Classical male/female gender the combine gametes to produce offspring (typical of vertebrates) • Cost of having “male” subsection: o You need a new classification of organism (not just a hermaphrodite) o Coefficient of offspring is half of asexual reproduction (female just reduced her fitness by half) o Evolution doesn’t favour this type of reproduction yet it still happens. Why?  Genetic diversity  It’s not pure cost… there are huge benefits • There is the potential of choosing mates  Lots of organisms can reproduce both asexually and sexually. • Hermaphrodism: is common in plants (~75% are hermaphrodites) and uncommon in animals… o “Uncommon in animals”. Why?  Because animals can move and seek mates o Mating systems  Monogamy • Exclusive relationship between male and female sex types o Not over the course of their whole life (monogamous not synonymous with lifetime mating) • Historically believed to be common in birds • One mate per breeding cycle • Social monogamy vs. genetic monogamy o Social
More Less

Related notes for BIOL208

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