Behaviors thought to be feminine or masculine differ from one culture to another and across time periods. Many artists have used their work to examine, question, and criticize the relationships between gender and society. As the feminist movement gained momentum in the 1960s and 1970s, artists began to challenge traditional roles of women, addressing topics such as women in domestic and public spheres, and the conventional standards of beauty.
DNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome.n contrast to DNA damage, a mutation is a change in the base sequence of the DNA. A mutation cannot be recognized by enzymes once the base change is present in both DNA strands, and, thus, a mutation cannot be repaired.
only method used in human experiments up to this time. Techniques of gene repair can replace abnormal segments of DNA in defective genes in their normal chromosomal site. Gene replacement techniques permit excision of the abnormal gene from its chromosome and replacement with a normal gene. These methods have not been developed sufficiently to use in human trials, but will be critical to the eventual deployment of germ-line therapy.