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Chapter 11: Human Genetics

Practice Test
      
  1.Which of these is NOT a normal treatment for people with sickle-cell anemia?  
  a.   antibiotics  
  b.   physical therapy  
  c.   blood transfusions  
  d.   drugs that increase oxygen-carrying capacity of blood cells  
  Hint    
      
  2.The presence of three of one kind of chromosome is known as _________ .  
  a.   translocation  
  b.   karyotyping  
  c.   hemophilia  
  d.   trisomy  
  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.   influenza  
  b.   malaria  
  c.   color blindness  
  d.   hemophilia  
  Hint    
      
  4.What is the process in which fluid surrounding the fetus is withdrawn to check for genetic disorders before a baby is born?  
  a.   amniocentesis  
  b.   chorionc villus biopsy  
  c.   genetic counseling  
  d.   ultrasonography  
  Hint    
      
  5.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   chorionic villus biopsy  
  b.   fetoscopy  
  c.   amniocentesis  
  d.   gene therapy  
  Hint    
      
  6.By how many codons is the gene for sickle-cell anemia hemoglobin different from normal hemoglobin?  
  a.   one  
  b.   four  
  c.   three  
  d.   two  
  Hint    
      
  7.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.   0%  
  b.   50%  
  c.   25%  
  d.   100%  
  Hint    
      
  8.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.   25%  
  b.   100%  
  c.   50%  
  d.   0%  
  Hint    
      
  9.What is the process in which genetic disorders can be treated by introducing normal alleles into body cells?  
  a.   genetic counseling  
  b.   gene therapy  
  c.   fetoscopy  
  d.   ultrasonography  
  Hint    
      
  10.What is the disease in which blood does not clot normally?  
  a.   Huntington's disease  
  b.   hemophilia  
  c.   cystic fibrosis  
  d.   sickle-cell anemia  
  Hint    

 
   
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