Can someone with mosaic Down syndrome have normal intelligence?

The mean IQ level of the mosaic Down syndrome group was significantly higher than that of the trisomy 21 group. Many subjects with mosaicism showed better verbal abilities, and some also demonstrated normal visual-perceptual skills in paper- and-pencil tasks.

Can people with Down syndrome be completely normal?

However, with appropriate medical care most children and adults with Down syndrome can lead healthy lives. The average life expectancy of individuals with Down syndrome is 60 years, with many living into their sixties and seventies.

Who is the oldest person with Down syndrome?

Sprightly Georgie Wildgust puts his longevity down to a love of dancing and an active social life surrounded by a strong network of family and friends. Strictly Come Dancing fan Georgie is now believed to be one of the oldest people in the world with Down’s syndrome and the oldest in the country.

What is the average IQ of a young adult with Down syndrome?

The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8- or 9-year-old child, but this number varies widely. Down syndrome is the most common chromosome abnormality in humans, occurring in about one per 1000 babies born each year.

Can you have more than one child with Down’s syndrome?

It is very unusual for parents to have more than one child with Down’s syndrome, or for relatives of these parents to have a child with the condition. Most people with Down’s syndrome have this type. Individuals with regular trisomy 21 have an extra chromosome 21 in every cell.

What is the incidence of Down syndrome among mothers?

Between 1979 and 2003, the number of babies born with Down syndrome increased by about 30\%. Older mothers are more likely to have a baby affected by Down syndrome than younger mothers.

How did Down syndrome increase between 1979 and 2003?

Between 1979 and 2003, the number of babies born with Down syndrome increased by about 30\%. Older mothers are more likely to have a baby affected by Down syndrome than younger mothers. In other words, the prevalence of Down syndrome increases as the mother’s age increases.