When is fluorescence in situ hybridization (fish) most likely to be used?
a. to find a gene associated with a particular disease
b. to determine the carrier status of a child whose sister has cystic fibrosis
c. to establish a diagnosis for a possible adult-onset single-gene disorder
d. to determine whether a stillborn infant has trisomy 13

To find a gene associated with a particular disease.

Option A

Explanation:

Fluorescence in situ hybridisation is a test which is done to recognise which portion or the part of the DNA is to be tested. It is done to see the presence or the absence of particular chromosome regions.

This technique is used to identify the chromosomal aberrations and with these aberrations, certain tests can be diagnosed in the human body. Therefore it is a very important technique. It is used by the molecular biologists to identify the area to be tested.

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