1.   Here we are talking about single genes cheating against the other genes with which they share a body.

2.   If we leap far enough, all the genes will be copies of one single gene in our ancestral population.

3.   Men are defined by their ownership of a single gene.

4.   The disease is under the control of a single dominant gene.

5.   The disease occurs when a child inherits a single dominant gene from a parent with the disease.

6.   They show that the crucial shift to self-fertilization in the cultivated plant involves but a single gene.

7.   We are not looking for a single gene which is wholly responsible for a disorder or a behavioural predisposition.

8.   A single gene will code for only one of the many molecules and cell proteins that are the building blocks of the brain.

9.   Single genes can now be transferred, added or deleted by manipulating the genetic material.

10.   Many single gene inherited diseases are caused by mutations which affect hepatic function, including haemophilia, phenylketonuria, and many of the disorders of cholesterol metabolism.