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Chapter 11: Human Genetics

Practice Test
  1.The presence of three of one kind of chromosome is known as _________ .  
  a.   translocation  
  b.   hemophilia  
  c.   karyotyping  
  d.   trisomy  
  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.   influenza  
  b.   malaria  
  c.   hemophilia  
  d.   color blindness  
  3.What body system does Huntington's disease affect?  
  a.   the circulatory system  
  b.   the nervous system  
  c.   the respiratory system  
  d.   the digestive system  
  4.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.   genetic counseling  
  b.   amniocentesis  
  c.   gene therapy  
  d.   chorionic villus biopsy  
  5.Which of these is NOT a normal treatment for people with sickle-cell anemia?  
  a.   antibiotics  
  b.   drugs that increase oxygen-carrying capacity of blood cells  
  c.   physical therapy  
  d.   blood transfusions  
  6.By how many codons is the gene for sickle-cell anemia hemoglobin different from normal hemoglobin?  
  a.   one  
  b.   three  
  c.   four  
  d.   two  
  7.What is the condition in which heterozygotes have an advantage over both types of homozygotes?  
  a.   homozygote inferiority  
  b.   color blindness  
  c.   heterozygote superiority  
  d.   Down syndrome  
  8.What is the process in which genetic disorders can be treated by introducing normal alleles into body cells?  
  a.   ultrasonography  
  b.   gene therapy  
  c.   genetic counseling  
  d.   fetoscopy  
  9.What process do prospective parents go through when they want to be sure any future child will be free of genetic defects?  
  a.   genetic counseling  
  b.   genetic engineering  
  c.   gene therapy  
  d.   marriage counseling  
  10.Which of these disorders can NOT be identified through amniocentesis?  
  a.   Down syndrome  
  b.   Tay-Sachs  
  c.   hemophilia  
  d.   sickle-cell anemia  

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