[问答题]
The diagram below sho5b ybd jo)358g xmic/ie5+mhxws chromosomr7f /s2n 7y vwmqeay33z+b+de es 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.
