catalyst #6 pg. 23 semester 2 table of contents 5. lesson 60- mutations and evolution pg. 15-18 6....
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Catalyst #6 Pg. 23Semester 2 Table of Contents
5. Lesson 60- Mutations and Evolution Pg. 15-18
6. Lesson 62- Genetic Variation Pg. 19-227. Lesson 63- Genetic Drift Pg. 23-26
Assigned Vocabulary- Due 2/11
13. Genetic Drift14. Founder’s Effect15. Bottleneck Effect
Vocabulary Due TODAYJustify your answer in complete and sentences.
Announcements
• Evolution Quiz #2- Friday• Notebook Check #1- Next Monday
– Will count as HW/classwork grade= 16.5% of final grade
Get Ready for Vocabulary Race- Take out whiteboard marker
• BEHAVIORAL EXPECTATIONS:– Noise Level 2- Can’t hear you from a few feet away– Facing forward– Bottoms in chairs whole time– Stay in seat
• DIRECTIONS:– Answer your specific question– Pass up the whiteboard– Last person in row hold up whiteboard– I’ll take 1st 2nd, and 3rd place– Team that wins will get bragging rights!
Round 11. This is a change in a species over time; process of biological
change by which descendents come to differ from their ancestors.
2. This is a mechanism by which individuals that have inherited beneficial adaptations produce more offspring on average than do other individualsThis type of white blood cell phagocytizes small particles
3. This person published On the Origin of the Species by Means of Natural Selection
4. This is a measure of an organism’s ability to survive and produce offspring relative to other members of a population
Round 11. This is a change in a species over time; process of biological
change by which descendents come to differ from their ancestors.
1. Evolution2. This is a mechanism by which individuals that have inherited
beneficial adaptations produce more offspring on average than do other individuals
1. natural selection3. inherited trait that is selected for over time because it allows
organisms to better survive in their environment 1. Charles Darwin
4. This is a measure of an organism’s ability to survive and produce offspring relative to other members of a population
1. fitness
Round 2
1. differences in physical traits of an individual from the group to which it belongs. You often give this
2. ability of a trait to be passsed from one generation to the next
3. inherited trait that is selected for over time because it allows organisms to better survive in their environment
4. body part that is similar in structure on different organisms but performs different functions
Round 21. differences in physical traits of an individual from the group
to which it belongs. 1. variation
2. ability of a trait to be passsed from one generation to the next
1. inheritability3. inherited trait that is selected for over time because it
allows organisms to better survive in their environment 1. adaptation
4. body part that is similar in structure on different organisms but performs different functions
1. Homologous structure
Round 3
1. remnants of an organ or structure that functioned in an earlier ancestor
2. the study of the earliest stages of growth and development of plants and animals
3. collection of alleles found in all of the individuals of a population
4. proportion of one allele, compared with all the alleles from that trait, in the gene pool
Round 31. remnants of an organ or structure that functioned in
an earlier ancestor 1. Vestigial structure
2. the study of the earliest stages of growth and development of plants and animals
1. embryology3. collection of alleles found in all of the individuals of a
population 1. Gene pool
4. proportion of one allele, compared with all the alleles from that trait, in the gene pool
1. Allele frequency
Question of the Day Pg. 23
• Use your prior knowledge to answer the following question on pg. 23
• How does genetic drift affect the diversity of a population?
Get Ready for Notes Pg. 24-25Title: Genetic DriftNo HW questions
• Behavior:– Silent– Not looking at ipads– Head up– Facing forward
Genetic Drift
Survivors are lucky, not more fit
Deceased are unlucky, not less fit
DNA frequency in a population changes simply by CHANCE not
fitness
Causes of Genetic Drift Random events:
1. natural disasters – hurricane, volcano, tsunami, earthquake, fire, etc
2. stepped on, ran over, picked up, put on a boat, stuck in a car, stuck to fur or clothing
3. at the wrong place at the wrong time
FOUNDER'S EFFECT:
some individuals of a population colonize a new habitat
ex: Columbus bringing organisms to USA
Spain: DNA Frequency66% pink33% red
S. America: DNA Frequency25% pink75% red
Bottleneck Effect: few survivors are left to reproduce
ex Hurricane Katrina
Before Katrina: DNA Frequency66% pink33% red
After Katrina: DNA Frequency40% pink60% red
survivors!
How does genetic drift affect the diversity of a population over time?
Genetic drift decreases diversity. In this case yellow and pink DNA are gone, and red DNA is now the majority.
Genetic drift = decrease in DNA diversity
Let's Do This Together: Did this population of Rivasitus
undergo genetic drift after a tornado killed all except one X and one O?
Allele frequency of Original Population: 13/26 X's = 50% 13/26 O's = 50%
Allele frequency of New Population: 1/2 X's = 50% 1/2 O's = 50%
X O O X X X O O O O X X X X X X X X X OO O O O O O
X O
survivors!
Let's Do This Together: Did this population of Rivasitus
undergo genetic drift?Original Population: 13/26 X's = 50% 13/26 O's = 50%
New Population: 1/2 X's = 50% 1/2 O's = 50%
X O O X X X O O O O X X X X X X X X X OO O O O O O
X ONODNA frequency
the SAME before and after!
You Try: Did this population of Rivasitus
undergo genetic drift?
Allele Frequency of Original Population: __/__ X's = ___% __/__ O's =___%
Allele Frequency of New Population: __/__ X's = __% __/__ O's = __%
X O O X X X O O X X
X X O O O O
XOXX O
You Try: Did this population of Rivasitus
undergo genetic drift?Original Population: 8/16 X's = 50% 8/16 O's =50%
New Population: 3/5 X's = 60% 2/5 O's = 40%
X O O X X X O O X X
X X O O O O
XOXX O
YES!DNA frequency
different before and after!
Check your understanding!
• Watch the video then answer the questions
• http://glencoe.mcgraw-hill.com/sites/9834092339/student_view0/chapter20/simulation_of_genetic_drift.html
• On the top of page 24 write how many questions you got correct out of 5
Genetic Drift Investigation PG. 26 (10 MIN)
• Quietly work with your partner to answer the question on in your notebook
• DO NOT WIRTE ON WORKSHEET
REVIEW OF INVESTIGATION
GENETIC DRIFT WITH DICE: WORM Coloring (20 MIN) PG. 26
WORM REVIEW (5 MIN)
ANSWER QUESTION OF THE DAY Pg.26
• How does genetic drift affect the diversity of a population?
• Draw a picture to help explain your answer
Evolution Video?