In recent years, there have been cases of different colored twins born to parents with mixed-race ancestry. However, Ben and Angela do not have such origins that medical experts could have used to explain their situation.

So three theories were offered: Nnamchi is the result of a gene mutation unique to her, and if that is the case, she would pass the gene on to her children if she has any in the future, and they would also likely be white. The second is that she is the product of dormant white genes which entered both of her parents’ families long ago, and they never surfaced until now. And then the third — albinism.

Professor Ian Jackson of the Human Genetics Unit at the Medical Research Council explained that both parents could be carrying a copy of the albino gene that has no surfaced in any known family member for years.

“This is perhaps one of the most common recessive disorders in Nigeria, and we have to remember that it comes in different forms,” Jackson told BBC. “In Type 2 we would see creamy skin and yellow hair or light brown, which in some cases would darken with age.”

Essentially, Nnamchi’s skin could darken over time, experts believed. “She doesn’t look like an albino child anyway. Not like the ones I have seen back in Nigeria or in books. She just looks like a healthy white baby,” Ben later said in the interview with The Sun.

“My mum is a black Nigerian although she has a bit fairer skin than mine. But we don’t know of any white ancestry.

“We wondered if it was a genetic twist. But even then, what is with the long curly blonde hair?

Watch the full interview below: