hat
Nati gen yon ajanda trè klè ak pwisan - yo ka resevwa jèn sa yo nan jenerasyon kap vini an. Li prospere sou varyete jenetik. Rezon ki fè la pou sa a se ranfòse pisin lan jèn. Inbreeding lakòz domaj jenetik ak enkyetid sante. Sa a se yon pwoblèm nan kilti anpil kote marye premye kouzen se nòmal la. Gen varyete jenetik vle di ke si gen yon epidemi nan maladi oswa lòt chanjman radikal nan kondisyon k ap viv, gen plis chans ke gen kèk moun ki pral gen yon melanj de jèn ki pral pèmèt yo siviv.
eng
Nature has a very clear and powerful agenda – to get those genes into the next generation. It thrives on genetic variety. The reason for this is to strengthen the gene pool. Inbreeding causes genetic defects and health concerns. This is a problem in many cultures where marrying first cousins is the norm. Having genetic variety means that if there is an epidemic of disease or other radical changes in living conditions, there is more likelihood that some individuals will have a mix of genes that will allow them to survive.