Dna Hybridization: The formation of hybrid DNA molecules that contain a strand of DNA from two different species. The number of complementary sequences in common in the two strands is an indication of the degree of relatedness of the species.

 

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Dna Hybridization: The formation of hybrid DNA molecules that contain a strand of DNA from two different species. The number of complementary sequences in common in the two strands is an indication of the degr . . . View Full Definition

In Situ Hybridization: Use of a dna or rna probe to detect the presence of the complementary dna sequence in cloned bacterial or cultured eukaryotic cells.

Junk DNA: Stretches of dna that do not code for genes: most of the genome consists of so-called junk dna which may have regulatory and other functions. Also called non-coding dna.

Hybridization: The combination of a set of atomic orbitals to produce a new set of 'hybrid' orbitals. Hybridized orbitals are theoretical constructions that make molecular structures easier to explain. For . . . View Full Definition

Fluorescence In Situ Hybridization (FISH): A physical mapping approach that uses fluorescein tags to detect hybridization of probes with metaphase chromosomes and with the less- condensed somatic interphase chromatin.

Exogenous DNA: Dna originating outside an organism that has been introducted into the organism.

Finished DNA Sequence: High-quality, low error, gap-free dna sequence of the human genome. Achieving this ultimate 2003 hgp goal requires additional sequencing to close gaps, reduce ambiguities, and allow for only . . . View Full Definition

Mitochondrial DNA: The genetic material found in mitochondria, the organelles that generate energy for the cell. Not inherited in the same fashion as nucleic dna.

Recombinant Dna Technology: A series of techniques in which DNA fragments are linked to self-replicating forms of DNA to create recombinant DNA molecules. These molecules in turn are replicated in a host cell to create . . . View Full Definition

Repetitive DNA: Sequences of varying lengths that occur in multiple copies in the genome: it represents much of the human genome.