Why do clementines have seeds?

Clementines are types of Mandarin oranges that are typically sweeter and seedless. Both varieties are part of the rutaceae family and are characterized by their small size and bright orange color.  Aside from the sweeter taste, being seedless is what distinguishes Clementine from mandarin oranges.  When people want to have an orange without the seeds, clementines are the best choice.  There are cases though that some clementines may have seeds inside them and this has puzzled some people.  For these people, clementines are supposed to be seedless and so they wonder why some of them have seeds.

The seeds found in some clementine varieties can be attributed to nature when some experts are asked about the subject. These experts would point out that the formation of seeds is something that only nature can explain.  Despite being usually seedless, some Clementine varieties may then end up to form some seeds from beneath its juicy flesh.

There are also people who blame the formation of seeds in some clementine varieties to cross-pollination.  Whenever Clementine farms encounter cross-pollination with other orange varieties, some trees may produce clementine fruits with some of the characteristics of other oranges.  In the case of cross-pollination from Mandarin oranges for example, the result will be the production of seeds in clementines.  With this kind of effect from cross-pollination through birds and bees, some Clementine farmers vigorously protect their farms from invading birds and bees.  For these farmers, growing seedless clementines means higher earnings and profits.  The fact that clementines are seedless means that these fruits command a higher price when compared to orange varieties with seeds.  Seedless orange varieties are also easier to sell making it easy for farmers to earn their way of living.  With their income at stake, clementine farmers oppose the idea of cross-pollination between different orange varieties.  Many of them go to great lengths just to protect their Clementine farms from being exposed to cross-pollination with other varieties.