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