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Scientists suggest a major evolutionary shift may have occurred when some human populations in east Africa, near the equator, migrated inland and changed their diet nstead of eating primarily marine creatures rich in vitamin D, they consumed pastured livestock and diminished their dietary intake of vitamin D. Considering ONLY the relationship between vitamin D and UV exposure, explain a possible effect of this lifestyle change over time on the frequency of light-skin in these populations.

Scientists suggest a major evolutionary shift may have occurred when some human populations in east Africa, near the equator, migrated inland and changed their diet nstead of eating primarily marine creatures rich in vitamin D, they consumed pastured livestock and diminished their dietary intake of vitamin D. Considering ONLY the relationship between vitamin D and UV exposure, explain a possible effect of this lifestyle change over time on the frequency of light-skin in these populations.

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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Scientists suggest a major evolutionary shift may have occurred when some human populations in east Africa, near the equator, migrated inland and changed their diet. Instead of eating primarily marine creatures rich in vitamin D, they consumed pastured livestock and diminished their dietary intake of vitamin D. Considering ONLY the relationship between vitamin D and UV exposure, explain a possible effect of this lifestyle change over time on the frequency of light-skin in these populations.
Transcribed Image Text:Scientists suggest a major evolutionary shift may have occurred when some human populations in east Africa, near the equator, migrated inland and changed their diet. Instead of eating primarily marine creatures rich in vitamin D, they consumed pastured livestock and diminished their dietary intake of vitamin D. Considering ONLY the relationship between vitamin D and UV exposure, explain a possible effect of this lifestyle change over time on the frequency of light-skin in these populations.
Cystic fibrosis (CF) is an autosomal recessive disorder. Several different individual point mutations in the CFTR gene cause cystic fibrosis. Two of the most common mutations (A and B) are shown on the diagram below. The lines below the gene represent ASO (allele-specific oligonucleotide) probes and the regions of the gene to which they hybridize. The "wild type" probe hybridizes to the wild type allele and the "mutant" probe hybridizes to the mutant allele of this gene. В CFTR gene Probe 1 wild type Probe 3 wild type Probe 2 mutant Probe 4 mutant Five people underwent ASO testing for cystic fibrosis using all four of the probes shown below. The results of this test are shown in the diagram. #1 #2 #3 # 4 #5 Probe 1 Probe 2 Probe 3 Probe 4
Transcribed Image Text:Cystic fibrosis (CF) is an autosomal recessive disorder. Several different individual point mutations in the CFTR gene cause cystic fibrosis. Two of the most common mutations (A and B) are shown on the diagram below. The lines below the gene represent ASO (allele-specific oligonucleotide) probes and the regions of the gene to which they hybridize. The "wild type" probe hybridizes to the wild type allele and the "mutant" probe hybridizes to the mutant allele of this gene. В CFTR gene Probe 1 wild type Probe 3 wild type Probe 2 mutant Probe 4 mutant Five people underwent ASO testing for cystic fibrosis using all four of the probes shown below. The results of this test are shown in the diagram. #1 #2 #3 # 4 #5 Probe 1 Probe 2 Probe 3 Probe 4
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