(TDD: 1-877-889-4424). Call Monday to Friday, 7 a.m. to 7 p.m. and Saturday 8 a.m. to 3 p.m. (March 11, 18 and 25). An enrollment counselor can answer your questions, update your information, and help you enroll by phone. Call anytime, day or night, to enroll using an automated phone system. 1-866-4U2Enroll (1-866-482-3676).
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.
Guide. Karyotype is a test to identify and evaluate the size, shape, and number of chromosomes in a sample of body cells.Extra or missing chromosomes, or abnormal positions of chromosome pieces, can cause problems with a person's growth, development, and body functions. Find out whether a chromosome defect is present in a fetus. 2  Karyotyping also may be done to find out whether chromosomal problems may have caused a fetus to be stillborn. 3  Find out the cause of a baby's birth defects or disability.