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DNA biology vocab
Term | Definition |
---|---|
anticodon | in tRNA, a triplet of nitrogenous bases that is complementary to a specific codone in mRNA |
chromosome | threadlike structure of nucleic acids that carries genetic information in forms of genes |
codon | in RNA, a three base "word" that codes for one amino acid |
crossing-over | two homologous pair exchange equal segments with eachother |
diploid | having two homologous sets of chromosomes |
DNA | molecule responsible for inheritance; nucleic acid that contains the sugar dexyribose |
DNA helicase | used to separate DNA |
DNA polymerase | enzyme involved in DNA replication that joins individual nucleotide to produce a DNA molecule |
DNA replication | process of copying a DNA molecule |
double helix | two strands of nucleotide wound about each other; structure of DNA |
fertilization | process when sperm and egg combine |
gamete | egg or sperm sex cell that contains a single set of chromosomes, one from each homologous pair |
haploid | having a single set of chromosomes |
homologous chromosome | one of a matching pair of chromosomes, one inherited from each parent |
karyotype | display of a person's 46 chromosomes |
meiosis | type of cell division that produces four cells; each with half as many chromosomes as the parent cell |
mRNA | RNA, molecule transcribed from a DNA template |
mutagen | physical or chemical agent that causes mutations |
mutation | any change in the nucleotide sequence of DNA |
nitrogen base | single or double ring of carbon and nitrogen atoms with attached functional groups, found in nucleic acids |
nucleotide | building block of nucleic acid polymers |
protein synthesis | process when biological cells generate new proteins |
RNA | nucleic acid containing the sugar ribose |
sex chromosome | one of two chromosomes of the 23rd pair of human chromosomes which determine an individual's gender |
tetrad | group of four chromatids formed during prophase 1 of meiosis by the two sister chromatids of each of the two homologous chromosomes |
trait | genetically determined characteristic |
transcription | process by which DNA template is used to produce a single stranded RNA molecule |
translation | process by which a sequence of nucleic acids in RNA direct the production of a chain of specific amino acids |
tRNA | RNA that translates the three-letter codons of mRNA to amino acids |