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genetics
| Term | Definition |
|---|---|
| Alleles | Alternative form of a gene |
| Heredity | offspring acquires the qualities of its parents. |
| Trait | character is a feature of an organism. |
| Recessive | Allele is hidden/ Not expressed |
| Dominant | Allele is present Expressed |
| Phenotype | Physical appearance |
| Genotype | genetic make up |
| Homozygous | same (TT) |
| Heterozygous | different (Tt) |
| Mutation | sudden change in the genetic material, therefore, mutation will be passed on to the offspring |
| Replication | the biological process of producing two identical replicas of DNA from one original DNA molecule. |
| Nucleotide | sugar, phosphate and a nitrogenous base |
| Transcription | the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. |
| Trannslation | Process by which the information coded in RNA is used to assemble a certain amino sequence. |
| Karyotyping | photograph is taken of a cell as mitosis is occurring. The picture of the chromosomes are then enlarged, cut out and arranged in pairs. (Trisomy 21---Down's syndrome) |
| Codon | The bases on the mRNA specifying a triplet base |
| Anticodon | a sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA. |
| Recombinant DNA | DNA that has been formed artificially by combining constituents from different organisms. |
| Restriction Enzyne | used to cut DNA |
| Genetic engineering | Recombinant DNA is the joining together of DNA from two different species, which is done by a method referred to as Gene splicing, |