Simplify the following text for a Grade 14 native English-speaking person.
Original: Her work was groundbreaking : she developed the technique for visualizing maize chromosomes and used microscopic analysis to demonstrate many fundamental genetic ideas , including genetic recombination by crossing-over during meiosisâ '' a mechanism by which chromosomes exchange information .
Simplified: She used microscopic analysis to show genetic recombination by crossing-over during meiosisâ '' a mechanism by which chromosomes exchange information .