[Solved] What is the best technique to identify structural changes in the mitral valve? A) Chest radiography B) Cardiac catheterization C) Transthoracic echocardiogram D) Cardiac stress test Nondisjunction: An error in cell division that results in offspring with an abnormal number of chromosomes. XXX Female: Typically refers to an individual with a rare genetic condition featuring an extra X chromosome, resulting in a 47,XXX karyotype. Gamete Formation: The process of forming gametes (sex cells such as sperm and eggs) through meiosis, in which the number of chromosomes is halved to ensure genetic diversity. XYY: Refers to a chromosomal arrangement where an individual, typically male, has an extra Y chromosome, leading to the genotype 47,XYY.