click below
click below
Normal Size Small Size show me how
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, |