What is the usual outcome of "crossing over" during meiosis I for both spermatogenesis and oogenesis?

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In gametogenesis, crossing over occurs when the four chromatids of each chromosome pair are lined up lengthwise and touch; the exchanges of chromosome material occur through breaks and rearrangements. The exchanges occur not just between chromatids from one parent but also among the four chromatids for both the maternal and paternal chromosomes of the pair. The result is a huge "shuffling" of genetic material, so at the end of the pachytene stage, the two chromosomes (with two chromatids each) are now combinations of maternal and paternal genes, rather than one purely maternal-derived chromosome and one purely paternal-derived chromosome.

What Is the Usual Outcome of "Crossing Over" During Meiosis