biology questions..? | Yahoo Answers Feb 05, 2009Answers. Best Answer: > 1. what clues to the presence of certain genetic disorders can be seen in a karyotype? An extra chromosome -- chromosome 21 trisomy is Down Syndrome. You'll also find things like XXX - superfemale XYY - supermale A missing chromosome -- having only one X chromosome with nothing pairing it (no second X,..Status: OpenAnswers: 2 Chromosome Analysis (Karyotyping) | LabCorp Chromosome analysis or karyotyping is a test that evaluates the number and structure of a person's chromosomes in order to detect abnormalities. Chromosomes are thread-like structures within each cell nucleus and contain the body's genetic blueprint. Each chromosome contains thousands of genes in specific locations.