Summary
Summary OCR A-Level Biology 6.2.11 Factors Affecting Evolution
- Course
- Institution
- Book
Revision summary of key knowledge from OCR A-Level Biology 6.2.11 Factors Affecting Evolution.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
OCR A-level Biology notes
-
OCR A-Level Biology 6.3.5 Gel Electrophoresis
-
OCR A-Level Biology 6.3.4 Polymerase Chain Reaction
Seller
Follow
izzylewington04
Content preview
Factors Affecting EvolutionNatural Selection
Variation in a species leads to some individuals being more well-suited to the
environment than others
These individuals are more likely to survive and reproduce to pass on their
advantageous alleles
This affects the allele frequency
Stabilizing Selection:
o Occurs when the environment remains unchanging
o Reduces genetic variation in the population
o Favours an intermediate allele
Directional Selection:
o Occurs when there is a change to the environment
o Gradual shift in the optimum value for the trait
o Favours an extreme allele
Disruptive/Diversifying Selection:
o Favours both extreme alleles
o Favours against the intermediate allele
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller izzylewington04. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.86. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
50843 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now