We haven't been able yet to determine in terms of genes what makes a human being a human and not another mammal.

We haven't been able yet to determine in terms of genes what makes a human being a human and not another mammal.

In 15 years we'll have all the sequence, a list of the genes everyone has in common and those that differ among people. We know only something like a tenth of 1 percent of the sequence at the moment.

Biology will relate every human gene to the genes of other animals and bacteria, to this great chain of being.

The list of genes that will come out of the genome project will be the tool that turns our questions into global ones.

We know specific genes are turned on in specific cells, but we don't know to what extent this happens.