[问答题]
The diagram below show3f2r3 fc j4nd9 3 zac8miwsf9ps chro/5x kjkfygj7, ihxqg.;o ;v/ gmosomes during meiosis.
1.1.On the diagram above, label chiasma with the letter R.
1.2.On the diagram above, label a chromatid with the letter Q.
2.Describe the process of crossing over.
3.Explain how crossing over results in the formation of genetically unique nuclei.