To establish the cause of a hereditary disease, the patient’s cells were examined and a change in the length of one of the

To establish the cause of a hereditary disease, the patient’s cells were examined and a change in the length of one of the chromosomes was detected. What research method allowed to establish the cause of this disease? What type of mutation is it associated with?

1) the cause of the disease is established using the cytogenetic method;
2) the disease is caused by a chromosomal mutation – the loss or attachment of a fragment of a chromosome.

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