1. The concordance is around 20 % for dizygotic twins.

2. Siblings and dizygotic twins share only 50 % of their segregating genes.

3. Conclusion: The twin girls originate from dizygotic and the extra chromosome 21 of the elder sister is from nondisjunction during the first meiotic division of the mother.

4. Dizygotic twins arise from two separate eggs fertilized by two spermatozoa.

4. try its best to collect and create good sentences.

5. Dizygotic twins - Twins born from the simultaneous fertilization of two different eggs by two different sperm.

6. The two embryos that dizygotic, not genetically identical. Therefore, the twins are not identical.

7. We describe a case of dizygotic twin pregnancy which was referred to our centre because of a discordant anomaly of one of the twins.

8. It has been reported that the concordance rate for peptic ulcer in monozygotic twins is greater than in dizygotic twins.

9. These reports indicate concordance rates of over 50% for monozygotic twin pairs compared with under 10% for dizygotic twins.

10. Notice to twin studies on the disease with the disease monozygotic twins than dizygotic twins rate of 4 to 6 times the height of the foster child as well.