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Chapter 11: Human Genetics

Practice Test
      
  1.What is the most commonly inherited disease among white people?  
  a.   Huntington's disease  
  b.   cystic fibrosis  
  c.   hemophilia  
  d.   sickle-cell anemia  
  Hint    
      
  2.The presence of three of one kind of chromosome is known as _________ .  
  a.   trisomy  
  b.   hemophilia  
  c.   karyotyping  
  d.   translocation  
  Hint    
      
  3.What is a picture of human chromosomes?  
  a.   karyotype  
  b.   fetoscope  
  c.   chorionic biopsy  
  d.   ultrasound  
  Hint    
      
  4.What is the condition in which heterozygotes have an advantage over both types of homozygotes?  
  a.   Down syndrome  
  b.   homozygote inferiority  
  c.   color blindness  
  d.   heterozygote superiority  
  Hint    
      
  5.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.   gene therapy  
  d.   amniocentesis  
  Hint    
      
  6.Which of these diseases is caused by a dominant gene?  
  a.   sickle-cell anemia  
  b.   Huntington's disease  
  c.   cystic fibrosis  
  d.   hemophilia  
  Hint    
      
  7.What two kinds of ions are involved in cystic fibrosis?  
  a.   iron and hydrogen ions  
  b.   chloride and iron ions  
  c.   sodium and chloride ions  
  d.   sodium and sulfur ions  
  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.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.   0%  
  b.   25%  
  c.   50%  
  d.   100%  
  Hint    
      
  10.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.   genetic engineering  
  d.   gene therapy  
  Hint    

 
   
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