XO

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XO,

the designation of a cell in which or individual in whom only one sex chromosome is present. Either the other X or the Y chromosome is missing so that each cell is monosomic and contains a total of 45 chromosomes. All XO individuals are females with Turner's syndrome. Individuals with only a Y chromosome do not survive.

symbol for the karyotype observed in most cases of Turner's syndrome, in which there is only one sex chromosome, an X chromosome.

symbol for the karyotype in which there is only one sex chromosome, an X chromosome.

XO genotype

in horses, pigs and cats causes infertile, usually anestrous, females; the uterus and external genitalia may be small and undeveloped.

XO ovarian dysgenesis

the second female X chromosome is missing, hence the XO of the title, and the animal, most commonly a mare, has small inactive ovaries which lack germ cells, and small uteri and external genitalia.

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aneuploidy Behçet's syndrome fetal hydantoin syndrome gonadoblastoma Gunn's syndrome Klinefelter's syndrome Klippel-Feil syndrome Mikulicz's syndrome monosomy nephrotic syndrome primary amenorrhea Riley-Day syndrome sex chromosome Stevens-Johnson syndrome Turner syndrome Turner's (XO) syndrome Turner's syndrome XO syndrome Xolair			xerotic xerotic eczema xerotic keratitis xerotomography xi Xi-cleft points Xifaxan Xigris Ximenia americana xin xiph(o)- xiph- xiphi- xiphisternal articulation xiphisternum xipho- xiphocostal xiphodynia xiphoid xiphoid process xiphoiditis xiphopagus Xiphophorus xixin XLD medium XO XO syndrome Xolair Xoloitzcuintli Xopenex XP XTC Xubix xue XX XX Male Syndrome XX sex reversal XX/XY chimaerism XXX XXX ovarian hypoplasia XXX Syndrome XXXX Syndrome XXXXX Syndrome XXXY XXXY males XXXY Syndrome XXY XXY syndrome XY XY gonadal agenesis syndrome XY sex reversal mares			XNF XNF xnf2ver XNF7 XNFS XNG XNGF XNGH XNI XNIF Xnix XNM XNMNX Xnor Xnor XNP XNR XNS XNS XNS IDP Control Protocol XNSCP XNSIDP XNSITP XNTP XNTY XNTY XNU XNU Is Not Unix XO XO Chart XO Charts XO Communications Inc XO Communications IP Administrator XO Communications, Inc. XO Communications, Network Violations XO computer XO genotype XO genotype XO ovarian dysgenesis XO ovarian dysgenesis XO syndrome XO syndrome XO system XOA XOAC XOAE xoana Xoanon XOATB XOB XOBIS XOC Xochicalco Xochimilco Xochimilco XOCM Xoco atl Xoco atl Xoco atl

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