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Chapter 11: Human Genetics

Practice Test
      
  1.What disease is caused by a defect in either of two alleles located on the X chromosome?  
  a.   red-green color blindness  
  b.   cystic fibrosis  
  c.   hemophilia  
  d.   sickle-cell anemia  
  Hint    
      
  2.What is the process in which fluid surrounding the fetus is withdrawn to check for genetic disorders before a baby is born?  
  a.   genetic counseling  
  b.   chorionc villus biopsy  
  c.   amniocentesis  
  d.   ultrasonography  
  Hint    
      
  3.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.   hemophilia  
  b.   influenza  
  c.   malaria  
  d.   color blindness  
  Hint    
      
  4.What is the most commonly inherited disease among black people?  
  a.   sickle-cell anemia  
  b.   cystic fibrosis  
  c.   hemophilia  
  d.   Huntington's disease  
  Hint    
      
  5.What process do prospective parents go through when they want to be sure any future child will be free of genetic defects?  
  a.   marriage counseling  
  b.   genetic counseling  
  c.   gene therapy  
  d.   genetic engineering  
  Hint    
      
  6.Which of these diseases is caused by a dominant gene?  
  a.   cystic fibrosis  
  b.   hemophilia  
  c.   Huntington's disease  
  d.   sickle-cell anemia  
  Hint    
      
  7.Which of these human disorders is the result of trisomy?  
  a.   red-green color blindness  
  b.   Huntington's disease  
  c.   hemophilia  
  d.   Down syndrome  
  Hint    
      
  8.What body systems does the disease cystic fibrosis affect?  
  a.   the endocrine and digestive systems  
  b.   the circulatory and respiratory systems  
  c.   the circulatory and endocrine systems  
  d.   the respiratory and digestive systems  
  Hint    
      
  9.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   fetoscopy  
  b.   amniocentesis  
  c.   chorionic villus biopsy  
  d.   gene therapy  
  Hint    
      
  10.The presence of three of one kind of chromosome is known as _________ .  
  a.   karyotyping  
  b.   translocation  
  c.   trisomy  
  d.   hemophilia  
  Hint    

 
   
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