What occurs during leptotene of prophase I?
A) The homologous chromosomes recognize one another by synapsis.
B) Crossing over occurs.
C) The replicated chromosomes condense.
D) The synaptonemal complex dissociates.
E) None of the answers are correct.

Question

Quizplus · Accepted Answer

During leptotene, the replicated chromosomes begin to condense and become visible under a microscope as thread-like structures. This process sets the stage for the next step of prophase I, which is synapsis.

What Occurs During Leptotene of Prophase I