Two genes situated very close on the chromosome show

High crossing over

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Hardly any crossing over is detected

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No crossing over

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Only double cross-over can occur

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Solution

The correct option is A Hardly any crossing over is detected
When the genes are situated very close to one another genetic linkage is established. The closer the physical location of two genes on the DNA, the less likely they are to be separated by a crossing-over event.

So, the correct answer is 'Hardly any crossing over is detected'.

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