The process in which chromosomal DNA is copied before mitosis or meiosis.
The shape of a DNA molecule formed when two twisted DNA strands are twisted.
A carbon ring structure found in DNA or RNA that contains one or more atoms of nitrogen.
A set of three nitrogen bases that represents an amino acid.
RNA that transports information form DNA in the nucleus to the cell's cytoplasm.
RNA that makes up the ribosomes.
RNA that transports amino acids to the ribosomes to be assembled into proteins.
A process in the cell nucleus where enzymes make an RNA copy of a DNA strand.
A process of converting informtion in mRNA into a sequence of amino acids in a protein.
Any agent that can cause a change in DNA.
Any change or random error in a DNA sequence.
A mutation that occurs at the chromosome level resulting in gene distribution to gametes during meiosis.
A mutation that occurs when a signle base is added or deleted from DNA.
A mutation in a Dna sequence; occurs from a change in a signle base pair.