Download Discussion Questions

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Journal
Discussion Questions
1. Please compare and contrast Darwin and Lamarck’s evolutionary
ideas. Use your textbook.
Reminders
Review your discussion questions and ppt
notes ~5 min each night for the daily
quizzes.
Root Quiz January 20th
Evolution & Taxonomy Exam on the 21stchapters 14, 15, and 17
**Science Fair- Shuttle at 12:40 today in the
back bus loading zone
QUIZ
1st period
Clear your desks of everything
Do NOT write on the quiz please
Use CAPITAL letters please
Keep your answers covered
If you need to make up a quiz due to an absence…
let me know
Flip it over when you are finished and hang on to it
Quick Notes about Natural Selection
• Four ways natural selection can act on a population
1.
Stabilizing Selection where the average
phenotype is selected for
Quick Notes about Natural Selection
• Four ways natural selection can act on a population
2. Directional Selection where one of the extremes
in phenotype is selected for
Quick Notes about Natural Selection
• Four ways natural selection can act on a population
3. Disruptive/Diversifying Selection where both of
the extremes in phenotype is selected for
Quick Notes about Natural Selection
• Four ways natural selection can act on a population
4. Sexual Selection- Based on the ability to attract
•
a mate. Usually males and females differ a lot.
• Ex: Peacocks.
I. Natural Selection causes populations to evolve
There are other mechanisms that cause evolution:
II. Mutation
III. Gene Flow (immigration, emigration)
IV. Recombination of chromosomes during gamete formation
AND
V. Genetic Drift – which are just chance events. Bad luck not bad
genes!
Examples:
A. Founder effect – where a small
segment of a population is displaced to a new area
B. Bottleneck effect- a natural disaster leaves a few
survivors (hurricane, fire, tornado, flood, etc)
https://www.youtube.com/watch
?v=5NdMnlt2keE
1st needs
Today’s Objective:
Objective:
To Review Evolution by analyzing a Bill Nye clip.
If time remains, to recognize and calculate the
frequency of alleles in a population over time to
determine if evolution is occurring
Greatest Discoveries with Bill Nye
“The Origin and Evolution of Life”
Complete the handout as we watch
Hardy- Weinberg ppt – If time remains today
Just listen….no fill in the blank notes
for this
Hardy – Weinberg
The Equations:
To calculate allele frequency use p + q = 1
To calculate genotypic frequency use the top equation
Round to the nearest tenth
P = dominant allele frequency q = recessive allele frequency
p2 = homozygous dominant frequency
Q2 = homozygous recessive frequency
2pq = heterozygous frequency
https://www.youtube.com/watch?v=xPkOAnK20kw
Hardy-Weinberg Practice
• Handout you picked up at the door.
• Work in your assigned groups to complete
the rest of the problems.
• SKIP SAMPLE 3
EXIT TICKET
1.
Please define evolution and give an example?
2.
Please explain microevolution and give an example
3.
Please describe speciation and give one way it can occur.
4.
Please compare and contrast natural and artificial selection