Cannon and his wife are being tormented by his evil twin, John (rotten teeth, terrified of dentists), a rich and ruthless sadist who "can't relinquish or respect either people or things".
2. Identical twins have identical teeth and jaws.
Townsend's previous studies regarding intra-coronal dimensions of molar teeth in twins are consistent with the concept of a dynamically developing crown pattern during odontogenesis, linked to the formation of enamel knots.
Rather than a simple monogenic mode of inheritance alone, we consider that a multifactorial model 7,45,83 – with genetic, epigenetic and environmental influences – provides the best explanation for our observations involving hypodontia and supernumerary teeth in MZ twin pairs, as well as different phenotypic expressions in MZ co-twins with ectodermal dysplasia.
We consider that a multifactorial model – with genetic, epigenetic and environmental influences – provides the best explanation for our observations involving differences of expression of hypodontia and supernumerary teeth in MZ twin pairs (Fig. 1).
We believe that such a multifactorial model, with multiple genetic, epigenetic and environmental influences, provides the best explanation for our observations involving missing and extra teeth in MZ twin pairs.
A similar explanation may also account for the discordant patterns of missing premolars or supernumerary teeth within MZ co-twins.
Differences in the number and position of missing teeth between MZ co-twins raise the likelihood that environmental and/or epigenetic influences during development can lead to quite distinct differences in dental development.
The findings of Eaves and colleagues are particularly relevant when attempting to explain differences in expression of missing and extra teeth between monozygotic co-twins with the same genotypes.
I thought of those people you read about sometimes with terrible potato-sized twins inside them, complete with hair and teeth.
But before their notoriety, the twins were enthusiastic young boxers, cutting their teeth in the carnival booths of the East End and eventually fighting as professionals.
