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chelseypowers chelseypowers
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6 years ago
Seth and Zack are twin brothers; Seth is tall with blue eyes and brown hair and Zack is short with brown eyes and red hair. How were they most likely conceived?
 
  a. One sperm fertilized one egg, which then split into two, early on in development.
  b. Two sperm fertilized one egg, which split into two, early on in development.
  c. One sperm fertilized two separate eggs.
  d. Two sperm fertilized two separate eggs.
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wrote...
6 years ago
ANS: D
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