21.   That led her to think of trying to simply destroy all proliferating cells in the area, regardless of what genes they were using to make themselves grow.

22.   The cancer genes could be used as diagnostic markers.

23.   The essential question for cloning researchers was whether the genes in an adult cell could still be used to create a new animal with the same genes.

24.   The genomes of these cereals are thought to be so similar that important genes could be used interchangeably.

25.   The idea is to develop tests using genes to determine if compounds are toxic.

26.   The virus she planned to use contained genes that could cause cancer in rodents, he reminded her.

27.   The virus uses the gene to make a protein that allows it to stick to the surface of lung cells, Taubenberger said.

28.   The treatment is made by using antibody genes from humans and mice.

29.   Using a gene injected directly into a diseased area, it prompts the body to grow new blood vessels.

30.   While every cell has the code for every gene, cells only use the genes they need.