Each chromosome carefully selected
Each protein and enzyme detected
Each nucleotide, each base and sulphide
Painstakingly mapped and inspected

The figures are dutifully totted
Till each t is crossed and i dotted
Each predisposition found by the physician
Is mindfully labelled and plotted

They're busy decoding our genes
Developing prenatal screens
Prescribing 'correctives' for 'nature's defectives'
The end justifying the means

The fetus's home is invaded
Its faculties measured and graded
Those failing the test are pulled from the nest
And (summarily) 'terminated'

And one day (they think) they'll obtain
By culling each 'deviant strain'
A gene pool far purer than dreamed by the Fuehrer
Achieved with the methods of Cain