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Arrange the following sentences to form a coherent paragraph:

1. Scientists have for the first time managed to edit genes in a human embryo to repair a  genetic mutation fuelling hopes that such procedures may one day be available outside laboratory condition.
2. The cardiac disease causes sudden death in otherwise healthy young athletes and affects about one in $500$ people overall.
3. Correcting the mutation in the gene would not only ensure that the child is healthy but also prevents transmission of the mutation to future generations.
4. It is caused by a mutation in a particular gene and a child will suffer from the condition even if it inherits only one copy of the mutated gene.
5. In results announced in Nature this week, scientists fixed a mutation that thickens the heart muscle, a condition called hypertrophic cardiomyopathy.
1. $21453$
2. $15243$
3. $54321$
4. $34215$