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Chapter 11: Human Genetics

Practice Test
      
  1.Which of these human disorders is the result of trisomy?  
  a.   red-green color blindness  
  b.   Huntington's disease  
  c.   Down syndrome  
  d.   hemophilia  
  Hint    
      
  2.What is the disease in which blood does not clot normally?  
  a.   sickle-cell anemia  
  b.   hemophilia  
  c.   Huntington's disease  
  d.   cystic fibrosis  
  Hint    
      
  3.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.   50%  
  b.   100%  
  c.   25%  
  d.   0%  
  Hint    
      
  4.Which of these disorders can NOT be identified through amniocentesis?  
  a.   hemophilia  
  b.   Tay-Sachs  
  c.   Down syndrome  
  d.   sickle-cell anemia  
  Hint    
      
  5.What is a picture of human chromosomes?  
  a.   karyotype  
  b.   fetoscope  
  c.   ultrasound  
  d.   chorionic biopsy  
  Hint    
      
  6.What body systems does the disease cystic fibrosis affect?  
  a.   the circulatory and endocrine systems  
  b.   the endocrine and digestive systems  
  c.   the respiratory and digestive systems  
  d.   the circulatory and respiratory systems  
  Hint    
      
  7.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.   malaria  
  c.   color blindness  
  d.   hemophilia  
  Hint    
      
  8.What process do prospective parents go through when they want to be sure any future child will be free of genetic defects?  
  a.   genetic engineering  
  b.   genetic counseling  
  c.   gene therapy  
  d.   marriage counseling  
  Hint    
      
  9.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   Y  
  b.   22nd  
  c.   21st  
  d.   X  
  Hint    
      
  10.The presence of three of one kind of chromosome is known as _________ .  
  a.   karyotyping  
  b.   hemophilia  
  c.   trisomy  
  d.   translocation  
  Hint    

 
   
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