Hybridization of <i>Mus musculus</i> whole chromosome X-specific probe (red signal) onto <i>A</i>. <i>flavicollis</i> metaphases with and without B chromosomes.

<p>(<b>a</b>) metaphase of a zero B male (3978); (<b>b</b>) metaphase of a one B female (3980); (<b>c</b>) metaphase of a three B female (3854); X chromosomes are marked. DAPI is grey (<b>a</b>, <b>b</b>) and blue (<b>c</b>).