Posted by: mrborden | March 13, 2016

Week 10 Natural Selection Types


Biology Week 10
March 14 2014
QFD : “Challenges are what make life interesting and overcoming them is what makes life meaningful.” – Joshua J. Marine
?FD : differentiate between the types of natural selection
Learning Objective:Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
HS-LS2-8.
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce.
1) film clip
2) notes
http://bivalves.teacherfriendlyguide.org/index.php?option=com_content&view=article&id=42&Itemid=124

March 15 2014
QFD : “I am thankful for all of those who said NO to me. Its because of them I’m doing it myself.” – Albert Einstein
?FD :name 3 adaptations made by mammals over the last 500 years
Learning Objective:Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
HS-LS2-8.
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce.
1) handout on natural selection

March 16 2014
QFD : “Go where you are celebrated – not tolerated. If they can’t see the real value of you, it’s time for a new start.” – Unknown
?FD : describe the difference between divergent and convergent evolution
Learning Objective: Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
HS-LS2-8.
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce.
1) evolution webquest

March 17 2016
QFD : “I am thankful for all of those who said NO to me. Its because of them I’m doing it myself.” – Albert Einstein
?FD :name 3 adaptations made by mammals over the last 500 years
Learning Objective:Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
HS-LS2-8.
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce.
1) test evolution

Multiple Choice Test
Please answer all questions
1 The effects of natural selection may be countered by
A) gene flow
B) genetic drift
C) mutation
D) inbreeding

2 In relation to natural selection, evolution is the
A) process
B) outcome
C) mechanism
D) purpose

3 Scientists generally agree that heterozygous advantage is
A) rare
B) frequent
C) pervasive
D) none of the above

4 The occurrence of large or small beak sizes among seed crackers in the absence of medium-sized beaks is an example of
A) directional selection
B) stabilizing selection
C) disruptive selection
D) none of the above

5 Sickle-cell trait in humans is a classic example of ____________________.
A) how mutations can lead only to tragic outcomes
B) why outbreeding is important
C) the superior fitness seen in heterozygotes
D) how every organism is an integrated gene complex

6 A person with sickle cell trait, having one S allele and one normal, will be resistant to malaria and eventually develop sickle cell anemia.
A) True
B) False

7 For a woman living in central Africa, which genotype would be the most advantageous to have?
A) homozygous for the sickle cell allele
B) heterozygous for the sickle cell allele
C) homozygous for the normal hemoglobin allele
D) it doesn’t matter; all are equally advantageous

8 Mating with relatives is called
A) inbreeding
B) outcrossing
C) random mating
D) clines
E) polymorphic

9 The random loss of alleles in a population is called
A) mutation
B) selection
C) genetic drift
D) electrophoresis
E) gene flow

10 Which of the following factors is most likely to contribute to gene flow between populations?
A) random mating
B) migration
C) mutation
D) genetic drift
E) inbreeding

11 In the Hardy-Weinberg equation, the term 2pq represents the frequency of the
A) dominant homozygotes
B) recessive homozygotes
C) dominant allele
D) recessive allele
E) heterozygotes

12 A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection?
A) 2 cm
B) greater than 2 cm or less than 2 cm
C) greater than 2 cm and less than 2 cm
D) can’t tell from the information given

13 Refer to question 16, but this time answer what you would expect after 10 generations of disruptive selection.
A) 2 cm
B) greater than 2 cm or less than 2 cm
C) greater than 2 cm and less than 2 cm
D) can’t tell from the information given

14 Refer to question 16, but this time answer what you would expect after 10 generations of directional selection.
A) 2 cm
B) greater than 2 cm or less than 2 cm
C) greater than 2 cm and less than 2 cm
D) can’t tell from the information given

15 Why is genetic polymorphism important to evolution?
A) individual variability provides the raw material for natural selection to act on
B) genes cannot mutate unless they are polymorphic
C) only heterozygous individuals are selected in natural populations
D) the Hardy-Weinberg equilibrium is less likely to be disturbed in polymorphic populations
E) none of the above; genetic polymorphism is not important to evolution

16 In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What was the frequency of the white allele, the only other allele for flower color?
A) 0.8
B) 0.4
C) 0.6
D) 0.2
E) 0.1

17 Referring to question 16, what is the frequency of homozygous red flower plants in the population?
A) 0.04
B) 0.16
C) 0.32
D) 0.48
E) 0.64

18 Referring to question 16, what is the frequency of homozygous white flower plants in the population?
A) 0.04
B) 0.16
C) 0.32
D) 0.48
E) 0.64

19 Referring to question 16, what is the frequency of plants in the population that are heterozygous for flower color?
A) 0.04
B) 0.16
C) 0.32
D) 0.48
E) 0.64

20 What is the ultimate source of genetic variability?
A) mutation
B) migration
C) genetic drift
D) nonrandom mating
E) selection

21 The movement of new genes into a population as a result of migration or hybridization is called
A) founder principle
B) selection
C) gene flow
D) bottleneck effect
E) adaptation

22 A virus killed most of the seals in the North Sea (e.g., dropped the population from 8000 to 800). In an effort to help preserve the species, scientists caught 20 seals and used them to start a new population in the northwest Pacific Ocean. Which of the following factors would most likely have the least impact in this new population?
A) founder effect
B) random mating
C) genetic drift
D) bottleneck effect

23 Inbreeding
A) increases the rate of mutation
B) increases the proportion of homozygous individuals in a population
C) never occurs in plants
D) all of the above
E) none of the above

24 Evolution by natural selection works best on a population having no variation.
A) True
B) False

25 According to Darwin’s theory of evolution, evolution occurs through natural selection operating on populations in ecosystems.
A) True
B) False

26 The theory of population genetics and how evolution occurs includes all but which one of the following
A) Mating must be random.
B) The size of the population is small.
C) There is no influx of genes from other populations.
D) No genotype has selective advantage over another.

27 Using the Hardy-Weinberg Principle, which expression represents the frequency of the homozygous recessive genotype?
A) p2
B) 2pq
C) q2
D) q

28 Which statement most accurately reflects what population geneticists refer to as “fitness”?
A) Fitness is the measure of an organism’s adaptability to various habitats.
B) Fitness reflects the number of mates each individual of the population selects.
C) Fitness refers to the relative health of each individual in the population.
D) Fitness is a measure of the contribution of a genotype to the gene pool of the next generation.

29 Mutation is a relatively unimportant source of variation and is not the foundation for evolution.
A) True
B) False

30 The fact that the majority of human newborns weigh around 7 pounds is reflective of ________________.
A) directional selection
B) stabilizing selection
C) disruptive selection
D) None of these is correct.

31 Organisms that are least likely to experience extinction over the long term are most likely to be found in _______________.
A) areas inhabited by humans
B) very stable habitats
C) desert
D) savanna

32 Which one of the following would cause the Hardy-Weinberg principle to be inaccurate?
A) The size of the population is very large.
B) Individuals mate with one another at random.
C) Natural selection is present.
D) There is no source of new copies of alleles from outside the population.
E) None of the answers is correct.

33 Which one of the following populations would most quickly lead to two groups with few shared traits?
A) a population with disruptive selection
B) a population with directional selection
C) a population with stabilizing selection
D) a population with no selection
E) none of the above

34 Mutations tend to have little effect on the allele frequency in a population.
A) True
B) False

35 The effects of genetic drift are most apparent in small populations.
A) True
B) False

March 18 2014

QFD : “Being happy doesn’t mean that everything is perfect. it means that you’ve decided to look beyond the imperfections.” – Unknown
?FD : describe how genes play a role in evolution of species
Learning Objective:Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment
HS-LS2-8.
Evaluate the evidence for the role of group behavior on individual and species’ chances to survive and reproduce.
1) film about adaptations

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Responses

  1. Dear Mr.Borden,
    Hi Borden. How have you been? I hope great and I hope your enjoying the summer. Me, I’m doing fine, a little bored. The reason I’m messaging you is because I need to ask a favor from you. I want to enroll at a five week summer
    theater conservatory. I need a letter of recommendation for a scholarship. The type of information the letter of recommendation is asking for is, how was my behavior in your class, how did I work in a group project, what type of grades did I get in your class. I hope to hear back from you soon. (send the letter of recommendation back as a message to the email address)

    Sincerley,
    Kevin Morales

    • June 16 2016

      Kevin morales was a very hard working student in my class. He was eager to help others and performed well in front of the class dipping presentations. He earned B + in my class and was one of the hardest workers. I would highly recommend him for any summer program he apples for !

      Sincerely
      Mark Borden
      Biology teacher , RMHS
      Mborden@psusd.us

      • Print this out or show it to them .. It should work and good luck Kevin


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