Words similar to xo

Example sentences for: xo

How can you use “xo” in a sentence? Here are some example sentences to help you improve your vocabulary:

Nearly all mammals have the XX female and XY male system, with XXY individuals being male and Xo individuals female.
In mammals and invertebrates, diploid animals of genotype Xo and XXY were crucial in establishing that doses of X confer femininity in invertebrates and that presence of Y confers masculinity in mammals.