Dim ond 1% o'r boblogaeth sy'n marw mewn ffordd sy'n golygu y gallant fod yn rhoddwyr organau gan fod angen i organau gael eu trawsblannu yn fuan iawn ar ôl marwolaeth, a rhaid bod y rhoddwr wedi marw mewn ysbyty o dan amodau penodol.
Only 1% of the population die in a way that means they can donate because organs have to be transplanted very soon after death and can only be donated by someone who has died in a hospital, under particular conditions.