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Tmi32 Tmi32
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Posts: 791
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6 years ago
Trisomy 21
 
  a. only occurs to infants of women who get pregnant at 45 years or older.
  b. is caused by nondisjunction.
  c. is caused by having three X chromosomes.
  d. is usually lethal.
  e. occurs only among non-human primates.
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