1. Measure the length of your hand in cm.
Warm-up 2/21:
Measure the length of your hand in cm.
Place ruler up on desk & Stand your hand up.
Measure from bottom of palm to tip of tallest finger.
Use your phone or a friends phone and enter your results at
or link on Mr. E’s page
Turn in flipbook.
Study for quiz.

2. DISRUPTING GENETIC EQUILIBRIUM
Warm-up 2/21: Part 2
What are the 5 conditions for Hardy-Weinberg genetic equilibrium?
DISRUPTING GENETIC EQUILIBRIUM
Ch pp

3. Definitions..
Evolution is the change in a population’s genetic material (alleles) over generations.
A population is in genetic equilibrium if it’s not evolving

4. WHAT PUSHES A POPULATION OUT OF EQUILIBRIUM?
5 Factors
Population is in equilibrium

5. I. Mutation
Produces and introduces new alleles in a population

6. II. Migration/ Gene Flow
Movement of individuals in or out of a population
Immigration – In (Entering population)
Emigration – Out (Leaving population)

7. III. Genetic Drift
The amount of an allele changes due to random events
Affects small populations mostly
Lose alleles if not enough to mate or a catastrophe occurs

8. IV. Natural Selection (3 Types)
Organisms best suited to their environment live to reproduce and pass on their genes
Acts on a phenotype
Varying types of selection

9. V. Non-random mating
Can amplify certain traits and reduce others through sexual selection
Sexual Selection - Choose mates based on specific traits and those traits increase in the population

10. HW: Due Tuesday: Vocab & Read p 321-325 Do problem p 325 #2-5
Due Mon: Read Do p320 #1-5 Due Mon
Due Tuesday: Vocab & Read p Do problem p 325 #2-5
Vocab (Tri-fold) for:
Vocab
Gene Flow
Phylogeny/ phylogenic tree
Genetic Drift
Adaptive Radiation
Stabilizing Selection
Allele frequency
Disruptive Selection
Gene pool
Directional Selection
Hardy-Weinberg genetic equilibrium
Superposition

11. Selection & SPECIATION
Warm up 2/24:
Define: Homologous Structures, Analogous Structures and Vestigial Organs/Structures.
Give 1 example of each
What is the main difference between a homologous structure and a vestigial Structure.
Selection & SPECIATION
Ch pp

12. Directional Selection
Individuals with a more extreme form of trait have higher fitness
Normal Distribution
Distribution after Selection

13. Stabilizing Selection
Having average form of trait has highest fitness
Normal Distribution
Distribution after Selection

14. Disruptive Selection
Individuals with any extreme trait has a higher fitness and most likely results in two new species
Normal Distribution
Distribution after Selection

15. Forming a new species Speciation: forming a new species
Species: a group of organisms that can mate and produce fertile offspring
1. same number of chromosomes
2. similar morphology (body
structure)

16. Species Types
Morphological Species – Defined using similar characteristics.
Biological Species – A species can reproduce and have fertile offspring.
A group of organism that can successfully interbreed.
Cannot breed fertile offspring with other species.

17. Disruptive Selection
Divergent evolution that most likely results in two new species

18. Mechanisms
Allopatric speciation caused by geographic isolation (physical separation of organisms)

19. Mechanisms Cont.
Sympatric Speciation due to reproductive isolation (barriers to successful breeding)
Prezygotic: before fertilization (i.e breeding times or home range)
Postzygotic: after fertilization- infertile
offspring (chromosome # doesn’t add up)
Liger – Tiger and Lion produce an infertile offspring

20. Schedule Homework Quiz: Friday 2/28 Exam Tuesday 3/4/2014
Vocab & bookwork due Tuesday
Speciation Activity Due Wednesday
Vocab & bookwork Due Thursday
Lab Due Friday
Study Guide Due Monday 3/3/2014
Raft: Due Friday 3/7/2014
Quiz: Friday 2/28
Exam Tuesday 3/4/2014
Intervention: Thursday After School & Friday Before School

21. HW: Due Tuesday: Vocab & Read p 321-325 Do problem p 325 #2-5
Vocab (Tri-fold) for:
Vocab
Gene Flow
Phylogeny/ phylogenic tree
Genetic Drift
Adaptive Radiation
Stabilizing Selection
Allele frequency
Disruptive Selection
Gene pool
Directional Selection
Hardy-Weinberg genetic equilibrium
Superposition

22. DISRUPTING GENETIC EQUILIBRIUM
Warm-up 2/21:
Describe what happened with the gene pool with the mice from yesterdays video. (Min. 3 sentences & use as much Vocab as you can.)
What are the five assumptions that must hold true to achieve genetic equilibrium?
DISRUPTING GENETIC EQUILIBRIUM
Ch pp