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Chapter 11: Human Genetics

Practice Test
      
  1.What two kinds of ions are involved in cystic fibrosis?  
  a.   iron and hydrogen ions  
  b.   chloride and iron ions  
  c.   sodium and sulfur ions  
  d.   sodium and chloride ions  
  Hint    
      
  2.Which of these diseases is caused by a dominant gene?  
  a.   Huntington's disease  
  b.   sickle-cell anemia  
  c.   hemophilia  
  d.   cystic fibrosis  
  Hint    
      
  3.What is the disease in which blood does not clot normally?  
  a.   sickle-cell anemia  
  b.   cystic fibrosis  
  c.   hemophilia  
  d.   Huntington's disease  
  Hint    
      
  4.What process do prospective parents go through when they want to be sure any future child will be free of genetic defects?  
  a.   genetic counseling  
  b.   marriage counseling  
  c.   genetic engineering  
  d.   gene therapy  
  Hint    
      
  5.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 daughter who has hemophilia?  
  a.   25%  
  b.   50%  
  c.   100%  
  d.   0%  
  Hint    
      
  6.What body systems does the disease cystic fibrosis affect?  
  a.   the circulatory and endocrine systems  
  b.   the respiratory and digestive systems  
  c.   the circulatory and respiratory systems  
  d.   the endocrine and digestive systems  
  Hint    
      
  7.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   22nd  
  b.   Y  
  c.   X  
  d.   21st  
  Hint    
      
  8.Which of these disorders can NOT be identified through amniocentesis?  
  a.   sickle-cell anemia  
  b.   Tay-Sachs  
  c.   Down syndrome  
  d.   hemophilia  
  Hint    
      
  9.What is the most commonly inherited disease among white people?  
  a.   sickle-cell anemia  
  b.   hemophilia  
  c.   Huntington's disease  
  d.   cystic fibrosis  
  Hint    
      
  10.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.   color blindness  
  b.   hemophilia  
  c.   malaria  
  d.   influenza  
  Hint    

 
   
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