What genetic mechanism involves the movement of carbohydrates produced in leaves to meristematic tissues?

Translocation is the correct answer because it refers to the process by which sugars and other organic nutrients produced during photosynthesis in the leaves are moved through the plant to various other parts, including meristematic tissues, which are regions of active cell division and growth. This movement primarily occurs in the phloem, the vascular tissue responsible for transporting the products of photosynthesis.

In plants, it is crucial for the distribution of carbohydrates because meristematic tissues rely on these resources for energy and building blocks necessary for growth and development. The process is vital for ensuring that different parts of the plant receive the nutrients they need to thrive.

The other options relate to different biological concepts. Gene expression involves the activation of specific genes to produce proteins and is not directly responsible for the transport of substances. Aneuploidy refers to an abnormal number of chromosomes, which can lead to issues in cell function and development but does not address the movement of carbohydrates. Cancer, while a significant biological topic, involves uncontrolled cell growth and division, unrelated to the translocation of nutrients within plants.