<prompt> XXY klinfilter which has extra-X-chromosomeY chromosomeBothNone  <response>: Ans. is a i.e., X-ehromosomeo The major numerical disorders of chromosomes are 3 autosomal trisomiesTrisomy 21 -- Down syndromeTrisomy 18 - Edwards syndromeTrisomy 13 - Patau syndromeo Four types of sex chromosomal aneuploidies:Turner syndrome usually 45,XKlinefelter syndrome 47,XXY47,XXX47.XYYo By far the most common type of trisomy in liveborn infants is trisomy 21 karyotype 4 7,XX, 21 or 47,XY, 21 or Down syndrome. 