By the year 2010, 17.8 million youths aged 16-19 will work, up from 16 million in 2000, according to government forecasts. Young workers suffer a disproportionate share of injuries and fatalities, especially in the first year on the job. In 2006, 30 youths under 18 died from work-related injuries.
A mutation may or may not affect the amino acid sequence. A mutation may or may not affect the phenotype. Some specific mutations in a gene may have more adverse affects than other mutations in the same gene. A mutation is not necessarily bad. It may even be good. A mutation may enhance or positively change the function of the protein produced by the gene.
Most of the mutations are not harmful because they are not transcribed to the genes due to a mechanism called DNA repair mechanism. The causes of mutations are so many, but there are tow types of the causes 1- Spontaneous mutations caused by mutagens. 2- Induced mutations caused by radiation, some chemicals.nswers. Best Answer: At the nucleotide level (point mutations): - Substitutions-Insertions-Deletions-Frameshifts This site explains these using illustrations better than I can here: http://evolution.berkeley.edu/evosite/ev...