click below
click below
Normal Size Small Size show me how
Mutations
| Question | Answer |
|---|---|
| Mutation | a permanent change in an organism's DNA (Sometimes inherited by ofspring) |
| Chromosomal mutation | affecting a whole or a part of the chromosome |
| Gene mutation | changes to the bases in the DNA of one gene ( A + T & G + C) |
| When does gene mutations take place? | It takes place when chromosomes duplicate during interphase |
| What are the three types of gene mutations | A necleotide added, deleted, or subsituted |
| What are the causes of mutations? | Occur naturaly, UV radiation, chemicals, or genetic |
| How is down syndrome caused? | an extra copy of the 21st chromosome. |
| Is a mutation bad or good? | Both |
| Apoptosis | If a cell is damaged beyond repair, it will self destruct |
| What are the 3 stages in Interphase | G1 (Gap 1), S ( Synthises), G2 (Gap 2) |
| G1 (Gap 1) | The cell will individually grow |
| G2 (Gap 2) | The cell grows more before mitosis |
| S (Synthises) | Replicates DNA |
| Checkpoint 1 | In G1, is the cell growing well enough, is DNA damaged, does the cell have recources it needs to keep going |
| Checkpoint 2 | In G2,, checks if DNA was replicated correctly in S phase, is it growing well, does it have recourses |
| Checkpoint 3 | In Metaphase, checks if chromosomes are lighned up in the middle correctly before seperating |
| Positive regulators | Allow cell to keep moving on between checkpoints ( Cyclin, CDK) |
| Negitive regulators | Make cell stop between checkpoints ( p53 - can initiate Apoptosis) |
| g0 | A resting phase, cells here preform cell functions but are not dividing |
| karyotyping | One way to identify a genetic disorder (chromosome analysis) |
| GMO | Genetically modified organisms (Their genes are altered on purpose with the goal of producing foods with desirable traits.) |