Complex sentence: However, a large number of species arrange the chromosomes in their somatic cells in fours ("tetraploid ") or even sixes ("hexaploid") which means that they can have diploid or even triploid germline cells.
Split into simpler sentences: However, a large number of species have the chromosomes in their somatic cells arranged in fours ("tetraploid ") or even sixes ("hexaploid"). Thus, they can have diploid or even triploid germline cells.