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Question

A bacterial colony containing DNA made up of 100% N15 nitrogen bases is allowed to replicate in a medium containing N14 bases. After one round of replication the result would be

A
All individuals will be identical to parents
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B
All individuals will be hybrids
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C
Only 50% individuals would be hybrids
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D
All individuals would have DNA made up of 100% N14
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Solution

The correct option is B All individuals will be hybrids
A bacterial colony containing DNA made up of 100% N15 nitrogen bases is allowed to replicate in a medium containing N14 bases. After one round of replication all individuals will be hybrids.

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