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Chapter 11: Human Genetics

Practice Test
  1.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.   100%  
  b.   25%  
  c.   50%  
  d.   0%  
  2.What is the most commonly inherited disease among black people?  
  a.   hemophilia  
  b.   sickle-cell anemia  
  c.   Huntington's disease  
  d.   cystic fibrosis  
  3.What disease is caused by a defect in either of two alleles located on the X chromosome?  
  a.   sickle-cell anemia  
  b.   cystic fibrosis  
  c.   hemophilia  
  d.   red-green color blindness  
  4.What two kinds of ions are involved in cystic fibrosis?  
  a.   iron and hydrogen ions  
  b.   sodium and sulfur ions  
  c.   sodium and chloride ions  
  d.   chloride and iron ions  
  5.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.   malaria  
  c.   influenza  
  d.   color blindness  
  6.Which of these human disorders is the result of trisomy?  
  a.   hemophilia  
  b.   Down syndrome  
  c.   Huntington's disease  
  d.   red-green color blindness  
  7.What body systems does the disease cystic fibrosis affect?  
  a.   the respiratory and digestive systems  
  b.   the circulatory and endocrine systems  
  c.   the circulatory and respiratory systems  
  d.   the endocrine and digestive systems  
  8.Which of these is NOT a normal treatment for people with sickle-cell anemia?  
  a.   drugs that increase oxygen-carrying capacity of blood cells  
  b.   blood transfusions  
  c.   antibiotics  
  d.   physical therapy  
  9.In what procedure can a physician look directly at a fetus inside the womb to check for abnormalities?  
  a.   fetoscopy  
  b.   gene therapy  
  c.   chorionic villus biopsy  
  d.   amniocentesis  
  10.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.   gene therapy  
  b.   genetic counseling  
  c.   amniocentesis  
  d.   chorionic villus biopsy  

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