AP Biologyeasymcq1 pt
Which statement about chiasmata is correct?
A.They are visible sites where crossing over occurred
B.They form during DNA replication
C.They join sister chromatids permanently
D.They occur in mitosis too
Explanation
Core Concept
Chiasmata are the X-shaped junctions where homologous chromatids have exchanged segments — physical evidence of recombination during prophase I.
Correct Answer
AThey are visible sites where crossing over occurred
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