Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
 
Chapter 11: Human Genetics

Practice Test
      
  1.What is the condition in which heterozygotes have an advantage over both types of homozygotes?  
  a.   homozygote inferiority  
  b.   color blindness  
  c.   Down syndrome  
  d.   heterozygote superiority  
  Hint    
      
  2.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.   hemophilia  
  b.   color blindness  
  c.   influenza  
  d.   malaria  
  Hint    
      
  3.What is the disease in which blood does not clot normally?  
  a.   Huntington's disease  
  b.   hemophilia  
  c.   sickle-cell anemia  
  d.   cystic fibrosis  
  Hint    
      
  4.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   Y  
  b.   21st  
  c.   X  
  d.   22nd  
  Hint    
      
  5.Cystic fibrosis is inherited when a child receives a recessive allele from each parent. What is the probability that parents who are both heterozygous for cystic fibrosis will have a child with this disease?  
  a.   100%  
  b.   25%  
  c.   75%  
  d.   50%  
  Hint    
      
  6.By how many codons is the gene for sickle-cell anemia hemoglobin different from normal hemoglobin?  
  a.   four  
  b.   two  
  c.   one  
  d.   three  
  Hint    
      
  7.What process do prospective parents go through when they want to be sure any future child will be free of genetic defects?  
  a.   gene therapy  
  b.   marriage counseling  
  c.   genetic engineering  
  d.   genetic counseling  
  Hint    
      
  8.What two kinds of ions are involved in cystic fibrosis?  
  a.   iron and hydrogen ions  
  b.   sodium and chloride ions  
  c.   chloride and iron ions  
  d.   sodium and sulfur ions  
  Hint    
      
  9.What is the most commonly inherited disease among black people?  
  a.   hemophilia  
  b.   Huntington's disease  
  c.   sickle-cell anemia  
  d.   cystic fibrosis  
  Hint    
      
  10.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   gene therapy  
  b.   amniocentesis  
  c.   chorionic villus biopsy  
  d.   fetoscopy  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies