not strictly true - calicos need XY chromosomes - ie female as such
but they could be XXY, also female, or XYY, male
I know this because we had an XYY calico cat which we took to the vet and referred to as 'he', no said the vet without looking, its a 'she' - but he wasn't [I can tell the difference ]
after checking, the vet explained about chromosomes
Bookmarks