difference between identical and fraternal twins
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Identical twins have the same genes, so they generally look alike and are the same sex. A woman's chances of having identical twins are not related to age, race or family history.
Fraternal twins (also called dizygotic twins) develop when two separate eggs are fertilized by two different sperm. Fraternal twins (like other siblings) share about 50 percent of their genes, so they can be different sexes. They generally do not look any more alike than brothers or sisters born from different pregnancies. Fraternal twins are more common than identical twins.
Fraternal twins (also called dizygotic twins) develop when two separate eggs are fertilized by two different sperm. Fraternal twins (like other siblings) share about 50 percent of their genes, so they can be different sexes. They generally do not look any more alike than brothers or sisters born from different pregnancies. Fraternal twins are more common than identical twins.
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Identical twins have the same genes, so they generally look alike and are the same sex. A woman's chances of having identical twins are not related to age, race or family history.
Fraternal twins (also called dizygotic twins) develop when two separate eggs are fertilized by two different sperm. Fraternal twins (like other siblings) share about 50 percent of their genes, so they can be different sexes. They generally do not look any more alike than brothers or sisters born from different pregnancies. Fraternal twins are more common than identical twins.
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