Bio Bootcamp Evolution Review
Feb 23, 2016
Bio Bootcamp
Evolution Review
Sample Question
This graph illustrates changes in two different lizard populations over time. Which process MOST LIKELY led to the change in the allele frequency for population B?
A. Natural selection acting on a harmful traitB. Natural selection acting on a beneficial traitC. Natural selection acting on a dominant traitD. Natural selection acting on a recessive trait
Population B
Population A
Sample Question
A mutation occurs in the genes that code for coat color in caribou. Which change will most likely result from this mutation?
A. A change in the selection pressures acting on coat color.
B. A change in the coat-color genes of deer predator species
C. An increase in coat-color diversity in the populationD. An increase in the number of genes for coat color in
the population.
Sample Question
The skeletons of vertebrate forelimbs contain variations of structures that were present in their common ancestor. What has MOST LIKELY cause the variation in forelimbs?
A. Changes in muscle structureB. Changes in genetic codeC. Changes in vestigial structuresD. Changes in artificial selection
Misconception: “Evolution is ‘just’ a theory.”Response: Scientific theories
are explanations that are based on lines of evidence, enable valid predictions, and have been tested in many ways. In contrast, there is also a popular definition of theory—a “guess” or “hunch.” These conflicting definitions often cause unnecessary confusion about evolution.
Evolution by Natural Selection
• EVOLUTION is the THEORY of how organisms have changed over time.
• Charles Darwin did NOT make this up!
• NATURAL SELECTION is the MECHANISM by which Evolution takes place.
• It does not attempt to explain how life began.
Natural Selection
Kettlewell – England – Peppered Moths
Allelic Frequency
Speciation
Founder Effect/Bottleneck
Geographic Isolation
Habitat Isolation - Lizards
Mechanical Isolation
Mechanical Isolation
Behavioral Isolation
Temporal Isolation
Reproductive Isolation
Types of Evolution
Convergent Evolution
Divergent Evolution
Artificial Selection
Coevolution
Fossils
Biogeography
Chapter 15Section 2 Evidence of Evolution
Hemoglobin Comparison
Biochemical
Chapter 17
Similarities in Amino Acid Sequences
Section 2 Systematics
Biochemical
Universal Genetic Code
Homologous Structures
• Forelimbs of vertebrates
Analogous Structures
Vestigial Structures
Evidence of Whale Evolution
Section 2 Evidence of EvolutionChapter 15
Embryology