Unreduced gametes, or gametes with the somatic chromosome number, are considered to be the driving force for polyploidization of plants in nature. Polyploidization is an important mechanism for ...

As viewed from a human perspective, nature has done some ingenious engineering to overcome some of the obstacles it has faced. Take the evolution of sex, for instance. To make the move from asexual to ...

This is a preview. Log in through your library . Abstract Development of megaspores and megagametophytes was analyzed for several diploid potato clones (Solanum spp.) that exhibit either high (HI) or ...

We analyzed a hybrid zone between two chromosome races (2n = 16 and 2n = 22) of a Japanese harvestman, Gagrellopsis nodulifera Sato and Suzuki (Arachnida: Opiliones: Phalangiidae). The hybrid zone is ...