Spot the odd one out! One of my broad beans has come up yellow rather than green. I'll grow it on to see what becomes of it but has anyone else ever had this happen?
The odd seed of anything can do this - it's a genetic mutation and may mean that chlorophyll isn't being made - unfortunately meaning it will die once it has used up the energy stored on the seed.
It will be a weak plant as it hasn't sufficient chlorophyll.