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Chapter 11: Human Genetics

Practice Test
  1.What is the process in which fluid surrounding the fetus is withdrawn to check for genetic disorders before a baby is born?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  
  2.By how many codons is the gene for sickle-cell anemia hemoglobin different from normal hemoglobin?  
  a.   two  
  b.   three  
  c.   one  
  d.   four  
  3.The presence of three of one kind of chromosome is known as _________ .  
  a.   karyotyping  
  b.   trisomy  
  c.   translocation  
  d.   hemophilia  
  4.Which of these disorders can NOT be identified through amniocentesis?  
  a.   sickle-cell anemia  
  b.   Tay-Sachs  
  c.   hemophilia  
  d.   Down syndrome  
  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.What is the most commonly inherited disease among white people?  
  a.   sickle-cell anemia  
  b.   hemophilia  
  c.   cystic fibrosis  
  d.   Huntington's disease  
  7.Hemophilia is due to a recessive allele on the ____ chromosome.  
  a.   X  
  b.   21st  
  c.   Y  
  d.   22nd  
  8.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.   color blindness  
  b.   malaria  
  c.   hemophilia  
  d.   influenza  
  9.What two kinds of ions are involved in cystic fibrosis?  
  a.   chloride and iron ions  
  b.   sodium and chloride ions  
  c.   iron and hydrogen ions  
  d.   sodium and sulfur ions  
  10.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.   gene therapy  
  c.   genetic engineering  
  d.   marriage counseling  

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