The gene encoding coat color is X-linked, and male cats have a single copy of the X chromosome. They can therefore express either the $O$ or $o$ allele, resulting in orange or black coat, respectively. Female cats, on the other hand, have two copies of the X chromosome. Thus, they can be heterozygous and express either orange or black. Using this information, select the possible genotypes for the individuals:
orange female:
$Oo$
$oo$
$O-$
$o-$
