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Chapter 11: Human Genetics

Practice Test
      
  1.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   21st  
  b.   X  
  c.   22nd  
  d.   Y  
  Hint    
      
  2.Which of these disorders can NOT be identified through amniocentesis?  
  a.   Tay-Sachs  
  b.   hemophilia  
  c.   sickle-cell anemia  
  d.   Down syndrome  
  Hint    
      
  3.Which of these diseases is caused by a dominant gene?  
  a.   hemophilia  
  b.   sickle-cell anemia  
  c.   cystic fibrosis  
  d.   Huntington's disease  
  Hint    
      
  4.The presence of three of one kind of chromosome is known as _________ .  
  a.   translocation  
  b.   karyotyping  
  c.   hemophilia  
  d.   trisomy  
  Hint    
      
  5.What disease is caused by a defect in either of two alleles located on the X chromosome?  
  a.   sickle-cell anemia  
  b.   hemophilia  
  c.   cystic fibrosis  
  d.   red-green color blindness  
  Hint    
      
  6.What body system does Huntington's disease affect?  
  a.   the digestive system  
  b.   the circulatory system  
  c.   the respiratory system  
  d.   the nervous system  
  Hint    
      
  7.What two kinds of ions are involved in cystic fibrosis?  
  a.   iron and hydrogen ions  
  b.   sodium and sulfur ions  
  c.   chloride and iron ions  
  d.   sodium and chloride ions  
  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.   color blindness  
  b.   hemophilia  
  c.   malaria  
  d.   influenza  
  Hint    
      
  9.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.   50%  
  b.   25%  
  c.   0%  
  d.   100%  
  Hint    
      
  10.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.   chorionic villus biopsy  
  b.   genetic counseling  
  c.   amniocentesis  
  d.   gene therapy  
  Hint    

 
   
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