<prompt> Chromosome number of paial hydatidiform mole most commonly is:-46 XX45 XO46 XXY69 XXX  <response>: Complete mole Paial mole No fetal tissue Fetal tissue present in a paial mole 90 are 46, XX, and 10 are 46, XY. All chromosomes are of paternal origin 69, XXX most common , or 69, XXY An Empty oocyte is feilized by a haploid sperm which then duplicates its chromosomes, or, an empty oocyte is feilized by 2 sperms This results from feilization of a haploid ovum by 2 sperms, both carrying X chromosome mostly Diffuse swelling of Chorionic villi Scalloping not seen Paial Swelling of chorionic villi Scalloping of villi seen There is diffuse trophoblastic hyperplasia Focal hyperplasia of trophoblastic tissue 