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People who have an extra X chromosome could have gotten it through
(A) nondisjunction.
(B) transposition.
(C) transduction.
(D) crossing over.
(E) all of the above.

Respuesta :

brittanycandace
A. Nondisjuntion, because they have an extra cell when the sperm and egg meet. 
beba561
I believe the answer is A,but a cross over could also be possible.

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