11. Even monozygotic twins with the mutation may have variations in seizure frequency and degree of cognitive impairment. 12. Moreover, since there are about 12 million monozygotic twins on Earth, the theoretical probability is not accurate. 13. Another cause of difference between monozygotic twins is epigenetic modification, caused by differing environmental influences throughout their lives. 14. Monozygotic twins always have different phenotypes.15. Even if employers are biased toward certain irrelevant characteristics, monozygotic twins should be affected by such biases equally. 16. Epigenetic differences accumulating over the life-span may account for the incongruent differences in eating disorders observed in monozygotic twins . 17. But if monozygotic twins separate early enough, the arrangement of sacs and placentas in utero is indistinguishable from dizygotic twins. 18. Moreover, if the hypothesis is valid, the differences between monozygotic female twins must be greater than between male monozygotic twins . 19. Thompson co-authored a widely cited twin study on communication disorders which found higher concordance in monozygotic twins than dizygotic twins. 20. Is there any genetic difference ( something like a minor mutation ), even small, to tell apart two monozygotic twins ?
