Multiple Choice
When homologous chromosomes cross over,what is the result?
A) Two sister chromatids get tangled,resulting in one altering the sequence of its DNA.
B) Two sister chromatids exchange identical pieces of DNA.
C) Specific proteins break the two strands of nonsister chromatids and re-join them.
D) Each of the four DNA strands of a homologous pair is broken,and the pieces are mixed.
Correct Answer:
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