1 Imagine being able of/to stop a disease before
it develops
2 Eye and hair colour are passed in/on through
genes.
3 Your characteristics can be affected by the
environment you were brought up/out in.
4 Many of our characteristics come of/from our
parents
5 Thanks to/for scientists, we are learning more
and more about DNA.
6 Ridding the world of diseases would have a
huge impact on in our future