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Case #2: Sickle-Cell Anemia As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, “S” rather than an, “A” allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce - so why is the allele still around? 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating?

Case #2: Sickle-Cell Anemia As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, “S” rather than an, “A” allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce - so why is the allele still around? 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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please help me with these 2 i dont have any questions left please help 

Case #2: Sickle-Cell Anemia As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, "S" rather than an, “A” allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce - so why is the allele still around? 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.
Transcribed Image Text:Case #2: Sickle-Cell Anemia As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, "S" rather than an, “A” allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce - so why is the allele still around? 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.
Case #3: Lactase Persistence Being able to digest lactose after the age of four is common / uncommon (circle one) around the world. 77% of European Americans and 14% of African Americans have the LCT gene on Chromosome 2, which codes to produce the enzyme lactase, which allows people to digest lactose in adulthood. 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.
Transcribed Image Text:Case #3: Lactase Persistence Being able to digest lactose after the age of four is common / uncommon (circle one) around the world. 77% of European Americans and 14% of African Americans have the LCT gene on Chromosome 2, which codes to produce the enzyme lactase, which allows people to digest lactose in adulthood. 2. 1. What forces of evolution are at work? Tick all that apply. Mutation Natural Selection Genetic Drift Gene Flow Is natural selection involved? If it is, then how, specifically is it operating? 3. Explain how the forces of evolution shift allele frequencies in the population over time. Your answer should include all of the 'forces' of evolution that you identified as being employed (above). Put this information into a narrative to explain how new traits are introduced, how individuals are selected (if present), and how alleles in the population shift over time.
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