Which of the following is a method that geneticists use to determine if an individual has chromosome abnormalities?

The correct answer would be karyotype of an individual.

Karyotype is the diagrammatic representation of the number and appearance of the chromosomes of an organism.

It determines the count of the chromosomes, their length, banding patterns, position of centromeres, difference between the sex chromosomes and other physical characteristics if present.

It helps in determining the presence of any chromosomal abnormalities in an organism.

For example, Turner syndrome (45, XO), Klinfelter syndrome (47, XXY), Down syndrome (trisomy of chromosome 21) et cetera .

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.