These are word's examples related to non-identical-twin. Click on any word to go to its word's detail page. Or, go to the definition of non-identical-twin.
Studies of identical and non-identical twins suggest that co-operative behaviour is heritable.
Identical twins, who have the same genes, were more likely to have a similar number of moles and freckles than non-identical twins.
Ellen gave birth to two non-identical twin boys, Brian and Roger.
