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Chapter 11: Human Genetics

Practice Test
      
  1.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 engineering  
  c.   gene therapy  
  d.   genetic counseling  
  Hint    
      
  2.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   Y  
  b.   21st  
  c.   22nd  
  d.   X  
  Hint    
      
  3.What body systems does the disease cystic fibrosis affect?  
  a.   the circulatory and respiratory systems  
  b.   the endocrine and digestive systems  
  c.   the circulatory and endocrine systems  
  d.   the respiratory and digestive systems  
  Hint    
      
  4.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   chorionic villus biopsy  
  b.   gene therapy  
  c.   amniocentesis  
  d.   fetoscopy  
  Hint    
      
  5.What is the process in which fluid surrounding the fetus is withdrawn to check for genetic disorders before a baby is born?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.   ultrasonography  
  c.   chorionc villus biopsy  
  d.   genetic counseling  
  Hint    
      
  6.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.   amniocentesis  
  b.   gene therapy  
  c.   genetic counseling  
  d.   chorionic villus biopsy  
  Hint    
      
  7.What is the process in which genetic disorders can be treated by introducing normal alleles into body cells?  
  a.   fetoscopy  
  b.   gene therapy  
  c.   genetic counseling  
  d.   ultrasonography  
  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 daughter who has hemophilia?  
  a.   25%  
  b.   100%  
  c.   50%  
  d.   0%  
  Hint    
      
  9.What is the condition in which heterozygotes have an advantage over both types of homozygotes?  
  a.   color blindness  
  b.   heterozygote superiority  
  c.   Down syndrome  
  d.   homozygote inferiority  
  Hint    
      
  10.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    

 
   
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