E) all of the above. 12) Describe a chemical test for distinguishing terminal alkynes from internal ones. 13) 2-Methylhex-3-yne can be prepared by the reaction of an alkynide with an alkyl halide.
Jeffreys, Alec John. 1/9/1950 â ENGLISH GENETICIST. Alec John Jeffreys is a geneticist who is best known for the introduction of DNA analysis to forensic science. He discovered one of the most important tools for identifying human beings, genetic fingerprinting. This procedure analyzes each individual's genetic code.
In 1949 he showed that even though different organisms have different amounts of DNA, the amount of adenine always equals the amount of thymine. The same goes for the pair guanine and cytosine. For example, human DNA contains about 30 percent each of adenine and thymine, and 20 percent each of guanine and cytosine.