Class Notes (835,430)
Canada (509,186)
Anthropology (869)
Lecture

Macroevolution Lecture.docx

3 Pages
97 Views
Unlock Document

Department
Anthropology
Course
Anthropology 1026F/G
Professor
Teresa Topic
Semester
Fall

Description
Oct. 17, 2011 Macroevolution - Variability & variation within species selected for survival - How it happens at the cell level (micro) - Macro = evolution above species level w/ focus on formation of species (speciation) - Species = pop. Of organisms capable of interbreeding & producing viable fertile offspring o Viable = functioning as individual organism o Fertile = able to produce offspring - Macroevolution key to understanding organisms within last 500 million years Factors affecting macro - Isolating mechanism o Separates breeding pop. o Prevents gene flow o Creates divergent subspecies o In time (if maintained) creates separate species - Genetic separation, genetic drift, social factors o Cuckoo bird calls o Darwin’s finches on differing islands Cladogenesis = recall clad Species B Species A Species A or C Eg. Split between monkeys & apes Anagenesis = sustained directional drift Species A Species B Evolutionary biologists differentiate between - Variational change o Gradual change over time - Punctuated equilibria o Long period of stability punctuated by periods of rapid change Oct. 17, 2011 Some types of genetic change have profound affect Homebox gene = responsible for large-scale effects of growth Heterochrony = change in timing of developmental ___________ Key Concepts: 1. ancestral traits - traits defining group of organisms because of chared ancestry - eg. Bilateral symmetry in vertebtrates (left & right side same in most organisms w/ spines 2
More Less

Related notes for Anthropology 1026F/G

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