निम्नलिखित में से कौन-सी गुणसूत्रीय स्थिति मोनोसोमिक (monosomic) अवस्था को दर्शाती है?

When a red (RR) flower plant is crossed with a white (WW) flower plant, all the offspring exhibit pink flowers, suggesting that the red and white alleles exhibit:

When a red (RR) flower plant is crossed with a white (WW) flower plant, all the offspring exhibit pink flowers. This phenomenon indicates: