Answer:
b. karyotype
Step-by-step explanation:
A karyotype is the complete set of chromosomes of an organism, arranged and displayed in pairs and ordered by size. It is used to identify chromosomal abnormalities and to study the genetic makeup of an organism. The karyotype can be visualized through a microscope after staining the chromosomes to make them visible. It is a powerful tool in genetics, as it can be used to identify specific chromosomal disorders and to study the genetic makeup of an organism.