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They look like friends who met at nursery school but Kaydon and Layton Richardson are in fact twin brothers with different-coloured skin.

The boys have celebrated their fourth birthday in the same week black parents Ben and Angela Ihegboro revealed their white daughter Nmachi to the world.

The genetic quirks make the children 'two-in-a-million' rarities that have fascinated doctors.

After hearing of the Ihegboro family's incredible baby news, Kaydon and Layton's mother Kerry said skin colour had been on her mind when giving birth to daughter Tiyannah recently.

'I thought it was crazy. As much as it happened to me, the twins' dad is white, so for it to happen to a black couple seems even stranger,' she said.

'When I was carrying Tiyannah I was wondering what colour she was going to be.

'Before the twins I would have expected that any child of mine would have my colour in them.

'But after Layton I wasn't sure what she was going to look like.

'When she was born she looked as though she was going to go dark but at about two weeks old it was clear she was white.

'I was a little surprised as I thought Layton was a one-off.

'Doctors can tell you what sex your baby is going to be but they can't tell you what colour!'

The 32-year-old, who is of English-Nigerian heritage, also fears the twins will stand out when they start primary school in September.

She said: 'It's never been an issue up to now but I know that Layton notices the difference in their colour.

'I've tried to explain it to them in the past but last year we were in an airport in America when Layton shouted, "Mum, am I white like my dad and Kaydon's black like you?".

'That was the first time he had said that but everyone thought it was very funny.

'I hope it's not going to be a problem when they start school but kids can be cruel.'

Kerry admits she is often suprised by the differences in their personality especially when it comes to interacting with others.

Source: Web