Like Y-DNA STRs, autosomal STRs are counts of repeated genetic code. As autosomal DNA recombines each generation, the number of markers shared with a specific ancestor is reduced by half each generation.
Heroin acts as a lipid soluble âprodrugâ within the brain, meaning that heroin itself is inactive but it is metabolized into an active form within the body. After crossing the blood-brain barrier, heroin is metabolized into morphine, which actively binds to opiate receptors in the brain producing the high.
Heroin is one of a group of drugs called opiates that are derived from the opium poppy. It usually comes as an off white or brown powder. A number of synthetic opiates are also manufactured for medical use and are open to abuse due to their similar effects to heroin, these include: 1  dihydrocodeine (Df118).ethadone and Subutex are prescribed as substitute drugs in the treatment of heroin addiction. Heroin is usually smoked ('chasing the dragon'), snorted or prepared for injection. Heroin is a powerful pain killer and has euphoric qualities.