Tetrad Analysis Shows That Crossing-Over Occurs at the Four-Strand Stage

question 26

Multiple Choice

Tetrad analysis shows that crossing-over occurs at the four-strand stage (i.e. , after replication) because, when two genes are linked,

• A)NPD > T.
• B)T > NPD.
• C)T > PD.
• D)PD > NPD.
• E)PD > T.

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