<Tr> <Td> fraternal </Td> <Td> dizygotic </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> </Tr> <Tr> <Td> half - identical </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> </Tr> <Tr> <Td> mirror image </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> </Tr> <Tr> <Td> mixed chromosome </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> <Td> x </Td> </Tr>

What do you call twins that are different genders