X0

Translingual

Adjective

X0

1. (biology, genetics) Having only one sex chromosome, X:
   1. in humans with Turner syndrome.
      • 2010 December 12, Julia E. Richards, R. Scott Hawley, The Human Genome, Academic Press, →ISBN, page 257:

        The most common examples of sex chromosome aneuploidies are Klinefelter syndrome (XXY males) and Turner syndrome, denoted X0 because Turner syndrome has only one sex chromosome, which is an X. Surprisingly, the vast majority of all X0 conceptions are miscarried spontaneously in utero.

   2. in e.g. certain insect species, in which X0 is the typical male configuration (and XX is female).
      • 2018 December 21, Bentlee Salinas, Plant Cytogenetics, Breeding and Evolution, Scientific e-Resources, →ISBN, page 206:

        XX/X0 Sex Chromosomes. In this variant of the XY system, females have two copies of the sex chromosome (XX) but males have only one (X0). The 0 denotes the absence of a second sex chromosome. Generally in this method, the sex is determined by amount of genes expressed across the two chromosomes. This system is observed in a number of insects, including the grasshoppers and crickets […]

Derived terms

• X0 system