In which phrase will cross-over occur?
b. prophase i
c. metaphase i
d. metaphase ii
i got mitosis wrong in penn foster high

The crossing over occurs in a sub phase of prophase I

This phenomenon occur in the remaining breaks and exchanges of pieces with the homologous chromatids, increasing genetic variation.

Answer B

hope this helps!

Ihaven't done that yet, so no idea,but this is not the right place to ask