The number and effect of mutations in mosquitoes are not affected by DDT but are influenced by the genes of mosquitoes that are resistant to DTT.
DDT (Dichloro Diphenyl Trichloroethane) is a synthetic organic insecticide that was first discovered and used widely in 1945. DDT during World War II saved around 25 million lives, especially from the threat of malaria and typhus. However, in 1948, reports of DDT resistance in mosquitoes and flies began to be reported. In 1954 Anopheles sundaicus was declared resistant to DDT.
Some insects are resistant to DDT. Once DDT is discovered, insects that do not have innate resistance and are exposed to this chemical will be wiped out from the population. Over time, the previous few resistant insects multiplied. Eventually, the entire species became a population of DDT-resistant members. When this happens DDT becomes ineffective against that insect species.
Learn more about mutations in mosquitoes at https://brainly.com/question/18591203
#SPJ4