Answer the following question given this paragraph: 

When homologous chromosomes pair up during meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It results in new combinations of genes on each chromosome.


Q: What is the term for the exchange of genetic material between non-sister chromatids of homologous chromosomes?


A:
crossing-over