Chapter 10

Chapter 10 - compared to another individual b) Examples i)...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 10 1) Natural Selection: selects among various individuals (unequal selection process); those individuals that have the “right” combination of alleles in a particular environment toend to survive and reproduce. a) Based on: i) Variation among individuals in a species (genetic proof), mutations are the source of all new alleles ii) Inheritance: adaptive alleles are passed onto offspring iii) More offspring are born than actually survive—completion for survival (food, habitat) iv) Evolutionary “fitness”= reproductive success (surviving, breeding offspring) v) Adaptation: a trait (physical or behavioral) that allows an individual to survive better
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: compared to another individual b) Examples i) Pesticide/ Antibiotic resistance ii) Artificial selection: mans use of a selection process (i.e.: develop specific breeds of dogs or other species) c) Outcomes i) Directional selection: selection favors one extreme; usually occurs when the environment is changed ii) Stabilizing selection: 2 opposing selection pressures that result in favoring the average type rather than the extremes (bell-shaped graph) iii) Diversifying selection: favors 2 extremes, works against average type...
View Full Document

This note was uploaded on 07/07/2008 for the course BIOL 115 taught by Professor Behrens during the Spring '07 term at Towson.

Ask a homework question - tutors are online