Answer:
the answer to your question is prophase 1 the top answer
Explanation:
I know I'm right because I had to do this in school helping my son and I remember exactly what the question was and I got it right would you please give me brainiest and add me and if you ask questions I'll help you more and more I'm too away from moving up one I really could use it and every answer I give is 99% right and I know this is right.
in prophase 1 tetrads of homologous chromosomes form and crossing over occurs add me as a friend and I'll try to help you out with more answers please give me brainiest
