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Chapter 11: Human Genetics

Practice Test
      
  1.What two kinds of ions are involved in cystic fibrosis?  
  a.   sodium and sulfur ions  
  b.   sodium and chloride ions  
  c.   iron and hydrogen ions  
  d.   chloride and iron ions  
  Hint    
      
  2.What is a picture of human chromosomes?  
  a.   chorionic biopsy  
  b.   karyotype  
  c.   ultrasound  
  d.   fetoscope  
  Hint    
      
  3.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   gene therapy  
  b.   chorionic villus biopsy  
  c.   amniocentesis  
  d.   fetoscopy  
  Hint    
      
  4.By how many codons is the gene for sickle-cell anemia hemoglobin different from normal hemoglobin?  
  a.   one  
  b.   four  
  c.   two  
  d.   three  
  Hint    
      
  5.What is the process in which cells from a tissue inside the womb are removed and grown to provide a karyotype of the fetus?  
  a.   genetic counseling  
  b.   gene therapy  
  c.   amniocentesis  
  d.   chorionic villus biopsy  
  Hint    
      
  6.What is the most commonly inherited disease among white people?  
  a.   Huntington's disease  
  b.   hemophilia  
  c.   sickle-cell anemia  
  d.   cystic fibrosis  
  Hint    
      
  7.What body system does Huntington's disease affect?  
  a.   the circulatory system  
  b.   the digestive system  
  c.   the respiratory system  
  d.   the nervous system  
  Hint    
      
  8.A person who is heterozygous for sickle-cell anemia has a condition known as sickle-cell trait. What disease does sickle-cell trait protect a person against?  
  a.   influenza  
  b.   hemophilia  
  c.   color blindness  
  d.   malaria  
  Hint    
      
  9.What body systems does the disease cystic fibrosis affect?  
  a.   the circulatory and endocrine systems  
  b.   the respiratory and digestive systems  
  c.   the endocrine and digestive systems  
  d.   the circulatory and respiratory systems  
  Hint    
      
  10.If a normal father and a mother who is a carrier of the allele for hemophilia have children, what is the probability that they will have a son who has hemophilia?  
  a.   0%  
  b.   100%  
  c.   50%  
  d.   25%  
  Hint    

 
   
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