How are some male cats calico or tortie?
Calico and tortie cats are almost always female, which we have covered in our article on calico cats. To recap, cats have 19 chromosome pairs, 18 autosomes and the sex chromosome pair of XX or XY. The chromosomes are located within the nucleus of every cell. Each chromosome is made up of matching pairs, which provides information from the mother and the father. Genes are located on the chromosomes and are tiny segments of DNA which act as a code that specifies the production of a protein, which do most of the work within the cells and are essential for the function and regulation of the body’s organs and tissues.