A gene which produces RNA molecules complementary to the normal messenger RNA of the target gene. Antisense genes prevent expression of the target gene and are used to selectively turn off production of certain proteins. A single-celled, microscopic organism without a distinct nucleus. The sequence of the bases in DNA determines the sequence of amino acids in all proteins found in living things. A long DNA molecule that contains the genes of the organism.
Chromosomes are visible in cells during cell division.
A group of organisms, cells or DNA sequences derived from the same ancestor. DNA is present in the nucleus and other organelles such as mitochondria and chloroplasts. DNA fingerprinting . A protein that acts as a catalyst. Chemical reactions in living organisms are facilitated by enzymes.