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The exchange of genetic material between chromatids of paired homologous chromosomes during first meiotic division is called

1. transformation
2. chiasmata
3. crossing over
4. synapsis

Correct answer: crossing over

Solution

Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during prophase I of meiosis. This recombination increases genetic variation in gametes.

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