trisomy-21

Of course, the genetic differences among all people with normal chromosome counts are far more subtle than those between a normal person and a person with trisomy-21.

The Volokh Conspiracy » Some Scientists’ Openness to the Possibility of Genetic Differences in Mental Traits Among Racial and Ethnic Groups 2010

Of course, the genetic differences among all people with normal chromosome counts are far more subtle than those between a normal person and a person with trisomy-21.

The Volokh Conspiracy » Some Scientists’ Openness to the Possibility of Genetic Differences in Mental Traits Among Racial and Ethnic Groups 2010

Of course, the genetic differences among all people with normal chromosome counts are far more subtle than those between a normal person and a person with trisomy-21.

The Volokh Conspiracy » Some Scientists’ Openness to the Possibility of Genetic Differences in Mental Traits Among Racial and Ethnic Groups 2010

Of course, the genetic differences among all people with normal chromosome counts are far more subtle than those between a normal person and a person with trisomy-21.

The Volokh Conspiracy » Some Scientists’ Openness to the Possibility of Genetic Differences in Mental Traits Among Racial and Ethnic Groups 2010

Now known as trisomy-21 because of the third copy of the 21st chromosome, Down syndrome was first described by the English doctor, John Langdon Down, in 1866 but until Professor Lejeune's publication in 1959, the ultimate cause of Down Syndrome was unknown.

unknown title 2009

I understand that most people choose to abort when they learn that they’re carrying a fetus with trisomy-21.

Seven Posts About Abortion, Prenatal Testing and Down Syndrome 2005