Which type of genetic testing examines a person’s chromosomes for variations in number or structure?

a. cytogenetic testing
b. electropherogram testing
c. predictive testing
d. preimplantation testing

Cytogenetic testing

Explanation:

Cytogenic testing is a chromosomal examination of cells in a sample of blood, bone marrow and tissue to identify abnormalities (such as the presence of extra chromosomes, rearranged or missing chromosomes).  

Depending on the nature of testing required, it could take between several days to weeks before the results are out and it should be interpreted by an oncologist or geneticist knowledgeable in the field.  

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