What environmental factors can cause mutations? - Socratic
2017年6月5日 · Anything in the environment that can cause a mutation is called as a mutagen. Environmental mutagens include : Radiations. Ionising radiations such as X rays, gamma rays, alpha particles, UV radiations and radioactive decay act as mutagens. Chemical. Chemicals that react with DNA molecules such as alkylators include ethyl methane sulfonate, methyl methane sulfonate, di ethyl sulfonate and ...
How does radiation cause mutation? + Example - Socratic
2016年8月19日 · Radiation can cause mutations in two different ways: Direct effect : radiation breaks bonds in DNA, this breaks the strands and mutation can occur when it is not properly repaired. Indirect effect : radiation causes other molecules to lose an electron; these molecules (reactive intermediates) can then interact with DNA to cause mutation.
How do alkylating agents cause mutations? + Example - Socratic
2017年3月27日 · Alkylating agents usually induce mispairing between bases. Alkylating agents transfer methyl or ethyl groups to bases or the backbone phosphate group. As a consequence,the altered bases pair with the wrong complement. This either disrupts base pairing directly or causes loss of bases. Which ever ways, this leads to faulty DNA replication or repair. For example when guanine is alkylated it can ...
What are some examples of deletion mutations? - Socratic
2014年7月13日 · According to numerous websites, there are few of these, mainly because large deletions cause death of the embryo. Here are three that have small or point deletions: Hereditary neuropathy with pressure palsies Smith-Magenis syndrome Williams-Beuren syndrome Williams-Beuren syndrome is caused by the spontaneous deletion of 26-28 genes on chromosome number 7. The deletion occurs at the time of ...
What type of mutation is caused by an insertion or deletion of a …
2016年6月23日 · Frameshift mutation. Three base pairs (codon) in RNA code for one specific amino acid. There is also a specific start codon (AUG) and three specific stop codons (UAA, UAG and UGA) so the cells knows where a gene/protein starts and where it ends. With this information you can imagine that deleting a base pair changes the entire code / reading frame, this is called a frameshift mutation . This ...
What best describes genetic mutations? + Example - Socratic
2017年7月19日 · A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms. mutations are accidents in the copying of DNA. Somatic mutations are accidents that occur in the bodies cells. These mutations often result in cancer, or a deformed limb or other body part. These mutations are not passed on to other organisms or except those directly affected ...
What is the relationship between environmental factors and
2016年4月10日 · environmental factors like radiation and chemicals exposure can cause cancer. Environment factors like UV rays, X rays, EtBr, aflatoxins etc causes mutations in DNA. such mutated cells undergo apoptosis and are killed Incase mutated cells continue to divide in an uncontrolled manner they can generate tumor. there are various check points in cell cycle to stop the division of damaged cell ...
Why does nondisjunction cause mutation? - Socratic
2014年9月20日 · Nondisjunction is the failure of homologous chromosomes or chromatids to segregate during mitosis or meiosis. Nondisjunction during mitosis can result in cancer. Nondisjunction during meiosis results in one daughter cell having both of a pair of parental chromosomes with the other having none. It causes a mutation in the number of chromosomes, either extra chromosomes or missing chromosomes ...
How do mutations affect species diversity? + Example - Socratic
2016年8月24日 · Mutations increase the amount of diversity within a population/species. Mutations increase the amount of diversity within a population/species. Mutations are the primary source of genetic diversity. By introducing new alleles into the population, the population becomes more heterogeneous. For example, if you have all white shirts, you have no diversity in the color of your shirts. Then let's ...
What sort of radiation can cause genetic mutations? | Socratic
2014年5月17日 · The genetic information of an organism is stored in the DNA molecule, a polynucleotide, which consists of three types of molecules: nitrogenous bases, deoxyribose sugars, and phosphate groups. Radiations that changes the chemical composition or the three dimensional arrangement of these molecules can cause genetic mutations. Ionizing radiation creates ions by breaking chemical bonds. Such ...