Gene therapy is a method of introducing nucleic acids (DNA or RNA) into the cells of an organism to correct an abnormality, such as a mutation, causing a pathology.
It is often a question of bringing a normal and functional gene (transgene) into a cell where the present gene is altered.
Another method can bring RNA capable of partially regulating or blocking the expression of an altered gene.
the earth spins once a day that's why we get day and night,but now while were spinning around the sun and spinning for one day its creates special zones for the seasons. And also the axis of the earth is always tilted ,and this also helps the seasons.
