biochem123

I need help on this question for my test. So in homologous recombination, you have 2 double stranded DNA in close proximity. Lets say the top chromosome has 5 repetitive sequences right after another, and the homologous chromosome below it has the same 5 sequences. These sequences are about 500 base pairs long. Let's say there is a DNA break on the third sequence set on the top strand. Then, homologous recombination, crossing over, non-crossovers, and other mechanisms will occur. Explain a reason that would result in overall 7 repeats of the sequence on the top strand and 5 still on the bottom strand. Any help would be appreciated. Thanks. Here is a visualization -------SeqSeqSe(DNA BREAK)qSeqSeq----- -------SeqSeqSeqSeqSeq---------