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21-08-2015
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Which of the following best defines nondisjunction? A.loss of a piece of a chromosome B.repetitive replications of the same piece of a chromosome
C.failure of chromosome pairs to sparate D.complete exchange of chromosome pieces

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22-08-2015

C. failure of chromosome pairs to separate
The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.
As a result, one daughter cell has two chromosomes or two chromatids, and the other has none.

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