Dizygotic

Dizygotic (also known as fraternal or non-identical twins) refers to a type of twins where two separate sperm fertilize two separate eggs. This results in the birth of two individuals who share about 50% of their genetic material, similar to any other siblings.

Overview

Dizygotic twins are the most common type of multiple births. They can be of the same sex or different sexes and look no more alike than ordinary siblings. This is in contrast to monozygotic twins, who are identical and share 100% of their genetic material.

Formation

Dizygotic twins form when two separate eggs are fertilized by two separate sperm. This can occur when a woman releases multiple eggs during her ovulation cycle and each egg is fertilized by a different sperm. The fertilized eggs then implant in the uterus and develop into separate fetuses.

Genetics

Dizygotic twins share about 50% of their genetic material, just like any other siblings. This is because they are formed from two separate eggs and sperm. The likelihood of a woman having dizygotic twins can be influenced by heredity, age, and the use of fertility treatments.

See also

• Monozygotic twins
• Multiple births
• Ovulation
• Genetics

References

Dizygotic Resources
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