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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.
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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.

User Ldrrp
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A. has three copies of chromosome 21.
User Jzepeda
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