Birgid Schlindwein's
Hypermedia Glossary Of Genetic Terms
Search Results
Birgid Schlindwein'sHypermedia Glossary Of Genetic TermsSearch Results |
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| Hybrid | A cross-bred, heterozygot organism or cell, an individual from any cross involving parents of differing genotypes. Offspring of unlike parents.. In molecular genetics a DNA molecule with strands of different origin. Cf. hybridisation. |
| Heterozygosity | The presence of different alleles of a gene at one or more loci. Cf. heterozygote |
| Crossing | Fertilization of an organism from an other organism with a different genetic constitution. Cf. Selfing. |
| Genotype | The term proposed by Johannsen (1909) for the hereditary constitution of an individual, or of particular nuclei within its cells. |
| Deoxyribonucleic acid (DNA) | The molecule that encodes genetic information. DNA is a double-stranded molecule held together by weak bonds between base pairs of nucleotides. The four nucleotides in DNA contain the bases: adenine (A), guanine (G), cytosine (C), and thymine (T). In nature, base pairs form only between A and T and between G and C; thus the base sequence of each single strand can be deduced from that of its partner. |
| Strand | It is customary in genetics to use strand for chromatid. It has therefore been used in that sense in some books, where it has also been used for one double-chain (that is, duplex) DNA molecule. Chain, but not strand, has been used for a single polynucleotide. |
| Hybridization | The process of joining two complementary strands of DNA or one each of DNA and RNA to form a double-stranded molecule. One strand is often labeled and used as a probe to detect the presence of the second strand. Cf. hybrid. |