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  • 24-02-2017
  • Biology
contestada

Down syndrome is a condition in which the individual
a. has three copies of chromosome 21.
b. has three copies of chromosome 23.
c. lacks chromosome 46.
d. has only one chromosome 21.

Respuesta :

kjb123
kjb123 kjb123
  • 24-02-2017
A. has three copies of chromosome 21.
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