When Homologous Chromosomes Cross Over,what Is the Result

question 7

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.

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