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1. karyotype-the appearance of the chromosomal makeup of a somatic cell in an individual or species (including the number and arrangement and size and structure of the chromosomes). physical composition, composition, make-up, makeup, constitution-the way in which someone or something is composed. Translations.
Main Image: A karyotype is a picture of all the chromosomes from an individualâs cells. A karyotype is a test used to check for chromosome abnormalities. A picture of a personâs chromosomes is created by staining the chromosomes with a special dye, photographing them through a microscope and arranging them in pairs.A karyotype gives information about the number of chromosomes a person has, the structure of their chromosomes and the sex of the individual.Down syndrome is diagnosed by a karyotype test. Down syndrome is a congenital condition caused by an extra chromosome. picture of a personâs chromosomes is created by staining the chromosomes with a special dye, photographing them through a microscope and arranging them in pairs. A karyotype gives information about the number of chromosomes a person has, the structure of their chromosomes and the sex of the individual.