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LE Modern Genetics
| Question | Answer |
|---|---|
| 1. Chromosomal mutations | changes in number or structure of chromosome; usually shows in phenotype because many genes are involved |
| 2. Substitutions | replacement of one or more gene in a gene sequence with another |
| 3. Insertions | segment of chromosome is inserted or added |
| 4. Deletions | segment of chromosome is lost or removed |
| 5. Translocations | segment of chromosome breaks off and reattaches to nonhomologous chromosome |
| 6. Inversions | segment of chromosome breaks off & reattaches at new point on original chromosome resulting in a change in the order of the genes |
| 7. DNA | deoxyribonucleic acid; the material found in all cells that contains the genetic information about that organism |
| 8. RNA | ribonucleic acid; class of single-stranded molecules transcribed from DNA, containing, a linear sequence of nucleotide bases that is complimentary to the DNA strand from which it is transcribed. |
| 9. Nitrogenous base | nitrogen containing base found in DNA; adenine, thymine, guanine, cytocine |
| 10. Transcription | mRNA transcribed from DNA |
| 11. Translation | protein made from RNA |
| 12. Codon | set of 3 bases used to determine amino acid formed |
| 13. Amino acid | building block of protein |
| 14. Protein | form from amino acids; makes up collagen, hemoglobin, antibodies, and enzymes |
| 15. Genetic engineering | set of technologies that humans use to alter the genetic instructions of an organism by substituting DNA molecules |
| 16. Biotechnology | the combination of technology & biological sciences |
| 17. Selective breeding | the process of choosing a few organisms with desirable traits to serve as parents of the next generation |
| 18. Recombinant DNA | isolate specific genes & insert isolated gene from one organism to DNA of another à recombinant DNA |
| 19. Plasmid | a segment of DNA independent of the chromosomes & capable of replication, occurring in bacteria & yeast; used in recombinant DNA procedures to transfer genetic material from cell to cell |
| 20. Hardy-Weinberg Principle | ideal condition where population remains stable if there is no mutation or migration, large population and random mating |