A geneticist studied the genome of a child. The geneticist discovered that the genetic material of the child had three copies of chromosome 13.

How would the geneticist learn this type of information about the child's genome?

through karyotyping

Explanation:

The geneticist can learn information about the child's genome through karyotyping.

Karyotyping is a process of analyzing the genome of organisms by first isolating the chromosomes of the organisms after which they are paired and ordered to provide a snapshot of their entire chromosome.

Thus, through karyotyping, all the chromosome sets of organisms can be analyzed and any abnormality detected. Chromosomes that are similar can be further analyzed and discovered to be copies of each other.

Therefore, the geneticist could have learned the information of the child having three copies of chromosome 13 through karyotyping of the child's genome.