DUPLICATE: make an exact copy of something
EXCHANGE: to pass something in both directions.
IDENTICAL: the same.
MATE: to have sex
MEIOSIS: a cell divides into four, they are differnt and each of which contains half the number of chomosomes.
MITOSIS: a cell divides into two. All them are the same.
OFFSPRING: the young of any living (descendiente)
PAIR UP: to form a pair
RANDOM: something happend without method (azar)
STRAND: a single piece of something. (cromátida)
