<span>Enzymes are catalysts, which means that they make chemical reactions go faster, but are not changed by the reaction,</span><span />
YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:2yyRr:yyrr
Answer:
Crossing over between segments of homologous chromosomes.
Explanation:
Crossing over happens during prophase I of meiosis I