Photo taken by me using my mobile phone tecno spark

Variegation:

The occurrence of a single plant producing both white and yellow roses is referred to as "variegation" or "chimerism." It is an uncommon hereditary condition caused by a genetic mutation that occurred in the developing plant's cells. The rare combination of white and yellow roses on the same plant can result from these mutations, which can cause various regions of the plant to display distinct hues. Horticulturists and rose enthusiasts highly value and seek for chimeric roses for their uniqueness and beauty, as well as their remarkable color contrast.