Question 23 Sickle Cell Anemia Sickle cell anemia is a group of blood disorders that develop when a person inherits a specific recessive gene mutation Gene mutations are permanent changes in a genetic sequence. The sickle cell mutation affects the structure of hemoglobin; hemoglobin allows red blood cells to carry oxygen. In order for a person to have sickle cell anemia, they have to inherit two copies of the recessive allele, one from each parent. The diagram shows the genotypes of an unaffected person and a person with sickle cell anemia Normal genotype DNA GAC ► II Pause Q Zoom Amino acid sequence Leucine GGA C mRNA CUGACUCCU GAG GAG Glutamic Glutamic acid acid Normal DNA G Threonine Proline Sickle cell anemia genotype с TG GGA CAC CTC mRNA CUGACUCCU GUGGAG Amino acid sequence Leucine Threonine Proline Valine Mutant Glutamic acid Normal red blood cells Sickled red blood cells Which statement explains why the structure of sickle cells differs from normal red blood cells? The gene mutation inhibited the cell's ability to produce tRNA The gene mutation prohibited DNA replication. The gene mutation affected the cell's ability to produce ATP. The gene mutation affected protein synthesis. The gene mutation inhibited the cell's ability to form ribosomes.

Human Anatomy & Physiology (11th Edition)
11th Edition
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Question 23
Sickle Cell Anemia
Sickle cell anemia is a group of blood disorders that develop when a person inherits a specific recessive gene mutation. Gene mutations are permanent changes in a genetic sequence. The sickle
cell mutation affects the structure of hemoglobin; hemoglobin allows red blood cells to carry oxygen. In order for a person to have sickle cell anemia, they have to inherit two copies of the recessive
allele, one from each parent. The diagram shows the genotypes of an unaffected person and a person with sickle cell anemia.
Normal genotype
DNA GAC TGA GGA CTC CTC
Pause Q Zoom
mRNA C|U|G| ACU
Amino acid
sequence
mRNA CLUG
Amino acid
sequence
CUGAG GAG
Glutamic
acid
Leucine Threonine Proline
Sickle cell anemia genotype
DNA GAC TGAGGA CAC CTC
Glutamic
acid
Normal
ACU CCU GUG GAG
Glutamic
acid
Leucine Threonine Proline
Valine
Mutant
K
Normal red blood cells
Culor
nocul
Sickled red blood cells
Which statement explains why the structure of sickle cells differs from normal red blood cells?
A. The gene mutation inhibited the cell's ability to produce tRNA.
B.
The gene mutation prohibited DNA replication.
C. The gene mutation affected the cell's ability to produce ATP.
D. The gene mutation affected protein synthesis.
E. The gene mutation inhibited the cell's ability to form ribosomes.
Q Review / ✓ Finish Test
ABG
Transcribed Image Text:Question 23 Sickle Cell Anemia Sickle cell anemia is a group of blood disorders that develop when a person inherits a specific recessive gene mutation. Gene mutations are permanent changes in a genetic sequence. The sickle cell mutation affects the structure of hemoglobin; hemoglobin allows red blood cells to carry oxygen. In order for a person to have sickle cell anemia, they have to inherit two copies of the recessive allele, one from each parent. The diagram shows the genotypes of an unaffected person and a person with sickle cell anemia. Normal genotype DNA GAC TGA GGA CTC CTC Pause Q Zoom mRNA C|U|G| ACU Amino acid sequence mRNA CLUG Amino acid sequence CUGAG GAG Glutamic acid Leucine Threonine Proline Sickle cell anemia genotype DNA GAC TGAGGA CAC CTC Glutamic acid Normal ACU CCU GUG GAG Glutamic acid Leucine Threonine Proline Valine Mutant K Normal red blood cells Culor nocul Sickled red blood cells Which statement explains why the structure of sickle cells differs from normal red blood cells? A. The gene mutation inhibited the cell's ability to produce tRNA. B. The gene mutation prohibited DNA replication. C. The gene mutation affected the cell's ability to produce ATP. D. The gene mutation affected protein synthesis. E. The gene mutation inhibited the cell's ability to form ribosomes. Q Review / ✓ Finish Test ABG
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