| 1. | Monozygotic twins have double concordance rate for hysterectomy compared to dizygotic twins.
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| 2. | Monozygotic twins, although genetically very similar, are not genetically exactly the same.
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| 3. | This heritable variation is known from heritability studies based on monozygotic twins.
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| 4. | In normal monozygotic twin development, one egg is fertilized by a single sperm.
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| 5. | This study is not the first case of different phenotypes occurring between monozygotic twins.
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| 6. | Monozygotic twins may also be created artificially by embryo splitting.
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| 7. | Monozygotic twins split into two zygotes at some time very early in the pregnancy.
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| 8. | Monozygotic twins can have markedly different epigenetic profiles.
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| 9. | Parent-offspring pairs share 50 % of their genes IBD, and monozygotic twins share 100 % IBD.
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| 10. | Another study in 2007 investigated the differences in brain structure between two adult, monozygotic twin females.
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