41.   It also contains genes resistant to some herbicides and to the antibiotic ampicillin.

42.   Normally, all the cells in the body, except the sperm and the egg, have two copies of each chromosome, which contain the genes.

43.   Since they contain human genes, their response to drugs more accurately mimics the response of humans.

44.   The chickens will be specially developed to contain genes that result in egg whites with proteins needed for drugs.

45.   The corn, known as Bt, contains a gene from a soil bacterium that makes the plant toxic to a moth larva.

46.   The most popular biotech crops contain bacterium genes that make the plants either resistant to bugs or weed killers.

47.   The so-called Bt-corn, which contains genes from bacteria known as Bacillus thuringiensis, is resistant to the corn borer pest.

48.   The Swiss company said its corn contains a gene that gives the plant protection against the European corn borer, a pest that can devastate crops.

49.   They found the flaws in chromosomes, the microscopic strings that contain genes.

50.   They also took unfertilized sheep eggs and removed the nucleus, the control room that contains the genes.