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| Term | Definition |
|---|---|
| DNA Replication | Process in which chromosomal DNA is copied before mitosis or meiosis. |
| Double Helix | Shape of a DNA molecule formed when 2 twisted DNA strands are coiled into a spriglike structure and held together by hydrogen bonds between the bases. |
| Nitrogen Base | Carbon ring structure found in DNA or RNA that contains one or more atoms of nitrogen. |
| Codon | Set of three Nitrogenous bases that represents an Amino Acid. |
| mRNA | RNA that transports information from DNA in the nucleus to the cell's cytoplasm. |
| rRNA | RNA that makes up the ribosomes. |
| Transcription | Process in the cell nucleus where enzumes make an RNA copy of a DNA strand. |
| tRNA | RNA that transports amino acids to the ribosomes to be assembled into proteins. |
| Translation | Process of converting information in mRNA into a sequence of amino acids in a protein. |
| Chromosomal mutation | Mutation that occurs at the chomosome level resulting in changes in the gene distribution to gametes during meiosis. |
| Frameshift mutation | Mutation that occurs when a single base is added or deleted from DNA. |
| Mutagen | Any agent that can cause a change in DNA. |
| Mutation | Any change or random error in a DNA sequence. |
| Point Mutation | Mutation in a DNA Sequence. Occurs from a change in a single base pair. |
| Clone | Genetically Identical copies of an organism or gene. |
| Gene splicing | In recombinant DNA technology, the rejoining of DNA fragments by vectors and other enzymes. |
| Genetic Engineering | Method of cutting DNA fom one oganism and inserting the DNA fragment into a host oganism of the same or diffeent species. |
| Plasmid | Small Ring of DNA found in a bacterial cell that is used as a biological factor. |
| Recombinant DNA | DNA made by recombining fragments of DNA from different sources. |
| Restriction Enzyme | DNA-cutting enzymes that can cut both strands of a DNA molecule at a specific nucleotide sequence. |
| Transgenic organism | Organisms that contain functional recombinant DNA from a different organism. |
| Vector | Means by which DNA from another species can be carried into the host cell. |
| Gene Therapy | Insetion of nomal genes into human cells to correct genetic disorders. |
| Human Genome | Map of the approximately 80,000 genes on 46 human chromosomes that when mapped and sequenced, may provide information on the treatment or cure of genetic disorders. |
| Linkage Map | Genetic Map that shows the location of genes on a chromosome. |