It occurs in one in every million twin births. They are very rare cases, and although many people twist their faces when they see them, they are likely to be born twins with different skin color. We tell you How is it possible.
They are biviteline or bicigotic twins, conceived through a double ovulation of the mother. The two ovules have been fertilized by two sperm in the same cycle, therefore the gestation time is the same and the babies share the maternal uterus, although they do not share amniotic bag, and most importantly: they have distinct genetic load.
And how can a black baby and a white baby be born? It happens when both parents have black and white genes in their DNA. Each ovule and each sperm has a different genetic load and each one can give rise to combinations that make some features or others manifest. Fortuitously, in the cases of twins of different skin color, an egg and a sperm have been linked with white genes and others with black genes.
The last case that has become known is that of a pair of British twins born a few days ago, Candice Anne and Aleisha Lilly: one with dark hair and black eyes, the other blonde and with light eyes. Their parents are mestizos and share American, African and European ancestry, so the mixture of both genes can, and in fact has happened, thanks to their recessive genes, give rise to very varied combinations.
We have also known other cases like that of the twins Kian and Remee who have already turned seven, the little Leo and Ryan born of a German and a Ghanaian, or to complicate it more, twins of different sex and color: a mulatto child and a White girl.
The twins with different skin color They are very rare cases of twins, but they can occur. Humans cross paths with people of other ethnicities, with different genes. Although we have a certain aspect, our DNA stores genes that have not manifested in our features, but can do so in our children.
In Babies and more | Probabilities of having twins, who will my baby look like?
