An advantage of reproduction is that a genetic disorder in a parent might not affect the offspring.

The advantage of sexual reproduction is that the offspring might not get the genetic disease carried by one of the parents since a mixture of two genetics are involved in the production of offspring that shares half of each’s  genetics it can be possible that genetic diseases might be skipped in the offspring.

Unlike sexual reproduction asexual reproduction has chances of genetic caring of diseases because the genes carry genetic information completely from the parent gene.  

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.