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MariettaO [177]
3 years ago
14

Cross-over involves the exchange of genetic information between

Biology
1 answer:
Ksju [112]3 years ago
3 0

2 Homologous chromosomes in meiosis, and then replicate into sister chromatids.

Hope this helps, ( or is clear enough ) if not, comment below please!!!!

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During T cell maturation, the t cells must pass two tests. first, immature t cells that can recognize MHC molecules are Selection. Second, immature t cells that recognize and bind to molecules normally found in the body are Activation.

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Learn more about self-antigens at : brainly.com/question/24468411

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