Biology Evolutionarily traits that have disappeared phenotypically do not necessarily disappear from an organism's DNA. The gene sequence often remains, but is inactive. Such an unused gene may remain in the genome for many generations. As long as the gene remains intact, a fault in the genetic control suppressing the gene can lead to it being expressed again. Sometimes, the expression of dormant genes can be induced by artificial stimulation.
Biology Evolutionarily traits that have disappeared phenotypically do not necessarily disappear from an organism's DNA The gene sequence often remains but is inactive Such an unused gene may remain in the genome for many generations As long as the gene remains intact a fault in the genetic control suppressing the gene can lead to it being expressed again Sometimes the expression of dormant genes can be induced by artificial stimulation